Well that was not a problem it was my silly mistake that I for some reason 
commented out the main() function in hurry and raninto such an error but 
now I encountered other errors while compilation as :

[ 50%] Building CXX object CMakeFiles/step-26.dir/step-26.cc.o
In file included from 
/home/pushkar/examples/step-26/point_comparison_operator.h:8,
                 from /home/pushkar/examples/step-26/step-26.cc:52:
/usr/local/include/deal.II/base/tensor_base.h:3:2: warning: #warning This 
file is deprecated. Use <deal.II/base/tensor.h> instead. [-Wcpp]
    3 | #warning This file is deprecated. Use <deal.II/base/tensor.h> 
instead.
      |  ^~~~~~~
/home/pushkar/examples/step-26/step-26.cc: In instantiation of 
‘Step26::HeatEquation<dim>::HeatEquation() [with int dim = 2]’:
/home/pushkar/examples/step-26/step-26.cc:1023:23:   required from here
/home/pushkar/examples/step-26/step-26.cc:108:23: warning: 
‘Step26::HeatEquation<2>::quadrature_collection’ will be initialized after 
[-Wreorder]
  108 |     Quadrature<dim>   quadrature_collection;
      |                       ^~~~~~~~~~~~~~~~~~~~~
/home/pushkar/examples/step-26/step-26.cc:107:26: warning:   
‘dealii::hp::DoFHandler<2, 2> Step26::HeatEquation<2>::dof_handler’ 
[-Wreorder]
  107 |     hp::DoFHandler<dim>  dof_handler;
      |                          ^~~~~~~~~~~
/home/pushkar/examples/step-26/step-26.cc:201:3: warning:   when 
initialized here [-Wreorder]
  201 |   HeatEquation<dim>::HeatEquation ()
      |   ^~~~~~~~~~~~~~~~~
/home/pushkar/examples/step-26/step-26.cc:132:20: warning: 
‘Step26::HeatEquation<2>::heat_conductivity’ will be initialized after 
[-Wreorder]
  132 |     const double   heat_conductivity;
      |                    ^~~~~~~~~~~~~~~~~
/home/pushkar/examples/step-26/step-26.cc:109:26: warning:   
‘dealii::Quadrature<1> Step26::HeatEquation<2>::face_quadrature_collection’ 
[-Wreorder]
  109 |     Quadrature<dim-1>    face_quadrature_collection;
      |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/pushkar/examples/step-26/step-26.cc:201:3: warning:   when 
initialized here [-Wreorder]
  201 |   HeatEquation<dim>::HeatEquation ()
      |   ^~~~~~~~~~~~~~~~~
/home/pushkar/examples/step-26/step-26.cc:201:3: error: uninitialized const 
member in ‘const double’ [-fpermissive]
/home/pushkar/examples/step-26/step-26.cc:135:21: note: ‘const double 
Step26::HeatEquation<2>::part_height’ should be initialized
  135 |     const double    part_height;
      |                     ^~~~~~~~~~~
/home/pushkar/examples/step-26/step-26.cc: In instantiation of ‘void 
Step26::HeatEquation<dim>::run() [with int dim = 2]’:
/home/pushkar/examples/step-26/step-26.cc:1024:32:   required from here
/home/pushkar/examples/step-26/step-26.cc:796:24: error: no matching 
function for call to ‘project(dealii::hp::DoFHandler<2, 2>&, 
dealii::ConstraintMatrix&, dealii::Quadrature<2>&, 
Step26::InitialCondition<2>&, dealii::Vector<double>&, bool, 
dealii::Quadrature<1>&)’
  796 |    VectorTools::project(dof_handler,
      |    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  797 |                constraints,
      |                ~~~~~~~~~~~~
  798 |          quadrature_collection,
      |          ~~~~~~~~~~~~~~~~~~~~~~
  799 |          initial_condition,
      |          ~~~~~~~~~~~~~~~~~~
  800 |          old_solution,
      |          ~~~~~~~~~~~~~  
  801 |          false,
      |          ~~~~~~         
  802 |          face_quadrature_collection);
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/pushkar/examples/step-26/step-26.cc:44:
/usr/local/include/deal.II/numerics/vector_tools.h:813:8: note: candidate: 
‘template<int dim, class VectorType, int spacedim> void 
dealii::VectorTools::project(const dealii::Mapping<dim, spacedim>&, const 
dealii::DoFHandler<dim, spacedim>&, const dealii::ConstraintMatrix&, const 
dealii::Quadrature<dim>&, const dealii::Function<spacedim, typename 
VectorType::value_type>&, VectorType&, bool, const dealii::Quadrature<(dim 
- 1)>&, bool)’
  813 |   void project (const Mapping<dim, spacedim>    &mapping,
      |        ^~~~~~~
/usr/local/include/deal.II/numerics/vector_tools.h:813:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:796:24: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::Mapping<dim, spacedim>’
  796 |    VectorTools::project(dof_handler,
      |    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  797 |                constraints,
      |                ~~~~~~~~~~~~
  798 |          quadrature_collection,
      |          ~~~~~~~~~~~~~~~~~~~~~~
  799 |          initial_condition,
      |          ~~~~~~~~~~~~~~~~~~
  800 |          old_solution,
      |          ~~~~~~~~~~~~~  
  801 |          false,
      |          ~~~~~~         
  802 |          face_quadrature_collection);
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/pushkar/examples/step-26/step-26.cc:44:
/usr/local/include/deal.II/numerics/vector_tools.h:830:8: note: candidate: 
‘template<int dim, class VectorType, int spacedim> void 
dealii::VectorTools::project(const dealii::DoFHandler<dim, spacedim>&, 
const dealii::ConstraintMatrix&, const dealii::Quadrature<dim>&, const 
dealii::Function<spacedim, typename VectorType::value_type>&, VectorType&, 
bool, const dealii::Quadrature<(dim - 1)>&, bool)’
  830 |   void project (const DoFHandler<dim,spacedim>  &dof,
      |        ^~~~~~~
/usr/local/include/deal.II/numerics/vector_tools.h:830:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:796:24: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::DoFHandler<dim, spacedim>’
  796 |    VectorTools::project(dof_handler,
      |    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  797 |                constraints,
      |                ~~~~~~~~~~~~
  798 |          quadrature_collection,
      |          ~~~~~~~~~~~~~~~~~~~~~~
  799 |          initial_condition,
      |          ~~~~~~~~~~~~~~~~~~
  800 |          old_solution,
      |          ~~~~~~~~~~~~~  
  801 |          false,
      |          ~~~~~~         
  802 |          face_quadrature_collection);
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/pushkar/examples/step-26/step-26.cc:44:
/usr/local/include/deal.II/numerics/vector_tools.h:846:8: note: candidate: 
‘template<int dim, class VectorType, int spacedim> void 
dealii::VectorTools::project(const dealii::hp::MappingCollection<dim, 
spacedim>&, const dealii::hp::DoFHandler<dim, spacedim>&, const 
dealii::ConstraintMatrix&, const dealii::hp::QCollection<dim>&, const 
dealii::Function<spacedim, typename VectorType::value_type>&, VectorType&, 
bool, const dealii::hp::QCollection<(dim - 1)>&, bool)’
  846 |   void project (const hp::MappingCollection<dim, spacedim> &mapping,
      |        ^~~~~~~
/usr/local/include/deal.II/numerics/vector_tools.h:846:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:796:24: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::hp::MappingCollection<dim, spacedim>’
  796 |    VectorTools::project(dof_handler,
      |    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  797 |                constraints,
      |                ~~~~~~~~~~~~
  798 |          quadrature_collection,
      |          ~~~~~~~~~~~~~~~~~~~~~~
  799 |          initial_condition,
      |          ~~~~~~~~~~~~~~~~~~
  800 |          old_solution,
      |          ~~~~~~~~~~~~~  
  801 |          false,
      |          ~~~~~~         
  802 |          face_quadrature_collection);
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/pushkar/examples/step-26/step-26.cc:44:
/usr/local/include/deal.II/numerics/vector_tools.h:863:8: note: candidate: 
‘template<int dim, class VectorType, int spacedim> void 
dealii::VectorTools::project(const dealii::hp::DoFHandler<dim, spacedim>&, 
const dealii::ConstraintMatrix&, const dealii::hp::QCollection<dim>&, const 
dealii::Function<spacedim, typename VectorType::value_type>&, VectorType&, 
bool, const dealii::hp::QCollection<(dim - 1)>&, bool)’
  863 |   void project (const hp::DoFHandler<dim,spacedim> &dof,
      |        ^~~~~~~
/usr/local/include/deal.II/numerics/vector_tools.h:863:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:796:24: note:   
‘dealii::Quadrature<2>’ is not derived from ‘const 
dealii::hp::QCollection<dim>’
  796 |    VectorTools::project(dof_handler,
      |    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  797 |                constraints,
      |                ~~~~~~~~~~~~
  798 |          quadrature_collection,
      |          ~~~~~~~~~~~~~~~~~~~~~~
  799 |          initial_condition,
      |          ~~~~~~~~~~~~~~~~~~
  800 |          old_solution,
      |          ~~~~~~~~~~~~~  
  801 |          false,
      |          ~~~~~~         
  802 |          face_quadrature_collection);
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/pushkar/examples/step-26/step-26.cc:44:
/usr/local/include/deal.II/numerics/vector_tools.h:896:8: note: candidate: 
‘template<int dim, class VectorType, int spacedim> void 
dealii::VectorTools::project(const dealii::Mapping<dim, spacedim>&, const 
dealii::DoFHandler<dim, spacedim>&, const dealii::ConstraintMatrix&, const 
dealii::Quadrature<dim>&, const std::function<typename 
VectorType::value_type(const typename dealii::DoFHandler<dim, 
spacedim>::active_cell_iterator&, unsigned int)>&, VectorType&)’
  896 |   void project (const Mapping<dim, spacedim>   &mapping,
      |        ^~~~~~~
/usr/local/include/deal.II/numerics/vector_tools.h:896:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:796:24: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::Mapping<dim, spacedim>’
  796 |    VectorTools::project(dof_handler,
      |    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  797 |                constraints,
      |                ~~~~~~~~~~~~
  798 |          quadrature_collection,
      |          ~~~~~~~~~~~~~~~~~~~~~~
  799 |          initial_condition,
      |          ~~~~~~~~~~~~~~~~~~
  800 |          old_solution,
      |          ~~~~~~~~~~~~~  
  801 |          false,
      |          ~~~~~~         
  802 |          face_quadrature_collection);
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/pushkar/examples/step-26/step-26.cc:44:
/usr/local/include/deal.II/numerics/vector_tools.h:928:8: note: candidate: 
‘template<int dim, class VectorType> void 
dealii::VectorTools::project(std::shared_ptr<const dealii::MatrixFree<dim, 
typename VectorType::value_type> >, const dealii::ConstraintMatrix&, 
unsigned int, const std::function<dealii::VectorizedArray<typename 
VectorType::value_type>(unsigned int, unsigned int)>&, VectorType&, 
unsigned int)’
  928 |   void project (std::shared_ptr<const MatrixFree<dim,typename 
VectorType::value_type> > data,
      |        ^~~~~~~
/usr/local/include/deal.II/numerics/vector_tools.h:928:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:796:24: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘std::shared_ptr<const 
dealii::MatrixFree<dim, typename VectorType::value_type> >’
  796 |    VectorTools::project(dof_handler,
      |    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  797 |                constraints,
      |                ~~~~~~~~~~~~
  798 |          quadrature_collection,
      |          ~~~~~~~~~~~~~~~~~~~~~~
  799 |          initial_condition,
      |          ~~~~~~~~~~~~~~~~~~
  800 |          old_solution,
      |          ~~~~~~~~~~~~~  
  801 |          false,
      |          ~~~~~~         
  802 |          face_quadrature_collection);
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/pushkar/examples/step-26/step-26.cc:44:
/usr/local/include/deal.II/numerics/vector_tools.h:939:8: note: candidate: 
‘template<int dim, class VectorType> void 
dealii::VectorTools::project(std::shared_ptr<const dealii::MatrixFree<dim, 
typename VectorType::value_type> >, const dealii::ConstraintMatrix&, const 
std::function<dealii::VectorizedArray<typename 
VectorType::value_type>(unsigned int, unsigned int)>&, VectorType&, 
unsigned int)’
  939 |   void project (std::shared_ptr<const MatrixFree<dim,typename 
VectorType::value_type> > data,
      |        ^~~~~~~
/usr/local/include/deal.II/numerics/vector_tools.h:939:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:796:24: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘std::shared_ptr<const 
dealii::MatrixFree<dim, typename VectorType::value_type> >’
  796 |    VectorTools::project(dof_handler,
      |    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  797 |                constraints,
      |                ~~~~~~~~~~~~
  798 |          quadrature_collection,
      |          ~~~~~~~~~~~~~~~~~~~~~~
  799 |          initial_condition,
      |          ~~~~~~~~~~~~~~~~~~
  800 |          old_solution,
      |          ~~~~~~~~~~~~~  
  801 |          false,
      |          ~~~~~~         
  802 |          face_quadrature_collection);
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/deal.II/dofs/dof_handler.h:32,
                 from /home/pushkar/examples/step-26/step-26.cc:38:
/usr/local/include/deal.II/hp/fe_collection.h: In instantiation of 
‘dealii::hp::FECollection<dim, spacedim>::FECollection(const FETypes& ...) 
[with FETypes = {int}; int dim = 2; int spacedim = 2]’:
/home/pushkar/examples/step-26/step-26.cc:217:10:   required from 
‘Step26::HeatEquation<dim>::HeatEquation() [with int dim = 2]’
/home/pushkar/examples/step-26/step-26.cc:1023:23:   required from here
/usr/local/include/deal.II/hp/fe_collection.h:469:77: error: static 
assertion failed: Not all of the input arguments of this function are 
derived from FiniteElement<dim,spacedim>!
  469 | rt(is_base_of_all<FiniteElement<dim, spacedim>, FETypes...>::value,
      |                                                              ^~~~~

/usr/local/include/deal.II/hp/fe_collection.h:478:7: error: cannot convert 
‘const int’ to ‘const dealii::FiniteElement<2, 2>&’
  478 |       push_back (*p);
      |       ^~~~~~~~~
/usr/local/include/deal.II/hp/fe_collection.h:124:56: note:   initializing 
argument 1 of ‘void dealii::hp::FECollection<dim, 
spacedim>::push_back(const dealii::FiniteElement<dim, spacedim>&) [with int 
dim = 2; int spacedim = 2]’
  124 |     void push_back (const FiniteElement<dim,spacedim> &new_fe);
      |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
/home/pushkar/examples/step-26/step-26.cc: In instantiation of ‘void 
Step26::HeatEquation<dim>::setup_system() [with int dim = 2]’:
/home/pushkar/examples/step-26/step-26.cc:787:4:   required from ‘void 
Step26::HeatEquation<dim>::run() [with int dim = 2]’
/home/pushkar/examples/step-26/step-26.cc:1024:32:   required from here
/home/pushkar/examples/step-26/step-26.cc:269:36: error: no matching 
function for call to ‘create_mass_matrix(dealii::hp::DoFHandler<2, 2>&, 
dealii::Quadrature<2>&, dealii::SparseMatrix<double>&, const 
dealii::Function<2, double>*, dealii::ConstraintMatrix&)’
  269 |   MatrixCreator::create_mass_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  270 |                        quadrature_collection,
      |                        ~~~~~~~~~~~~~~~~~~~~~~
  271 |          mass_matrix,
      |          ~~~~~~~~~~~~               
  272 |          (const Function<dim> *)0,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~  
  273 |          constraints);
      |          ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:239:8: note: candidate: 
‘template<int dim, int spacedim, class number> void 
dealii::MatrixCreator::create_mass_matrix(const dealii::Mapping<dim, 
spacedim>&, const dealii::DoFHandler<dim, spacedim>&, const 
dealii::Quadrature<dim>&, dealii::SparseMatrix<number>&, const 
dealii::Function<spacedim, number>*, const dealii::ConstraintMatrix&)’
  239 |   void create_mass_matrix (const Mapping<dim, spacedim>       
&mapping,
      |        ^~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:239:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:269:36: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::Mapping<dim, spacedim>’
  269 |   MatrixCreator::create_mass_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  270 |                        quadrature_collection,
      |                        ~~~~~~~~~~~~~~~~~~~~~~
  271 |          mass_matrix,
      |          ~~~~~~~~~~~~               
  272 |          (const Function<dim> *)0,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~  
  273 |          constraints);
      |          ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:251:8: note: candidate: 
‘template<int dim, int spacedim, class number> void 
dealii::MatrixCreator::create_mass_matrix(const dealii::DoFHandler<dim, 
spacedim>&, const dealii::Quadrature<dim>&, dealii::SparseMatrix<number>&, 
const dealii::Function<spacedim, number>*, const dealii::ConstraintMatrix&)’
  251 |   void create_mass_matrix (const DoFHandler<dim,spacedim>    &dof,
      |        ^~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:251:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:269:36: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::DoFHandler<dim, spacedim>’
  269 |   MatrixCreator::create_mass_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  270 |                        quadrature_collection,
      |                        ~~~~~~~~~~~~~~~~~~~~~~
  271 |          mass_matrix,
      |          ~~~~~~~~~~~~               
  272 |          (const Function<dim> *)0,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~  
  273 |          constraints);
      |          ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:277:8: note: candidate: 
‘template<int dim, int spacedim, class number> void 
dealii::MatrixCreator::create_mass_matrix(const dealii::Mapping<dim, 
spacedim>&, const dealii::DoFHandler<dim, spacedim>&, const 
dealii::Quadrature<dim>&, dealii::SparseMatrix<typename 
dealii::numbers::NumberTraits<Number>::real_type>&, const 
dealii::Function<spacedim, number>&, dealii::Vector<number>&, const 
dealii::Function<spacedim, typename 
dealii::numbers::NumberTraits<Number>::real_type>*, const 
dealii::ConstraintMatrix&)’
  277 |   void create_mass_matrix (const Mapping<dim, spacedim>   &mapping,
      |        ^~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:277:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:269:36: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::Mapping<dim, spacedim>’
  269 |   MatrixCreator::create_mass_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  270 |                        quadrature_collection,
      |                        ~~~~~~~~~~~~~~~~~~~~~~
  271 |          mass_matrix,
      |          ~~~~~~~~~~~~               
  272 |          (const Function<dim> *)0,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~  
  273 |          constraints);
      |          ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:291:8: note: candidate: 
‘template<int dim, int spacedim, class number> void 
dealii::MatrixCreator::create_mass_matrix(const dealii::DoFHandler<dim, 
spacedim>&, const dealii::Quadrature<dim>&, dealii::SparseMatrix<typename 
dealii::numbers::NumberTraits<Number>::real_type>&, const 
dealii::Function<spacedim, number>&, dealii::Vector<number>&, const 
dealii::Function<spacedim, typename 
dealii::numbers::NumberTraits<Number>::real_type>*, const 
dealii::ConstraintMatrix&)’
  291 |   void create_mass_matrix (const DoFHandler<dim,spacedim> &dof,
      |        ^~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:291:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:269:36: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::DoFHandler<dim, spacedim>’
  269 |   MatrixCreator::create_mass_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  270 |                        quadrature_collection,
      |                        ~~~~~~~~~~~~~~~~~~~~~~
  271 |          mass_matrix,
      |          ~~~~~~~~~~~~               
  272 |          (const Function<dim> *)0,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~  
  273 |          constraints);
      |          ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:303:8: note: candidate: 
‘template<int dim, int spacedim, class number> void 
dealii::MatrixCreator::create_mass_matrix(const 
dealii::hp::MappingCollection<dim, spacedim>&, const 
dealii::hp::DoFHandler<dim, spacedim>&, const 
dealii::hp::QCollection<dim>&, dealii::SparseMatrix<number>&, const 
dealii::Function<spacedim, number>*, const dealii::ConstraintMatrix&)’
  303 |   void create_mass_matrix (const 
hp::MappingCollection<dim,spacedim>       &mapping,
      |        ^~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:303:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:269:36: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::hp::MappingCollection<dim, spacedim>’
  269 |   MatrixCreator::create_mass_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  270 |                        quadrature_collection,
      |                        ~~~~~~~~~~~~~~~~~~~~~~
  271 |          mass_matrix,
      |          ~~~~~~~~~~~~               
  272 |          (const Function<dim> *)0,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~  
  273 |          constraints);
      |          ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:314:8: note: candidate: 
‘template<int dim, int spacedim, class number> void 
dealii::MatrixCreator::create_mass_matrix(const dealii::hp::DoFHandler<dim, 
spacedim>&, const dealii::hp::QCollection<dim>&, 
dealii::SparseMatrix<number>&, const dealii::Function<spacedim, number>*, 
const dealii::ConstraintMatrix&)’
  314 |   void create_mass_matrix (const hp::DoFHandler<dim,spacedim>    
&dof,
      |        ^~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:314:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:269:36: note:   
‘dealii::Quadrature<2>’ is not derived from ‘const 
dealii::hp::QCollection<dim>’
  269 |   MatrixCreator::create_mass_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  270 |                        quadrature_collection,
      |                        ~~~~~~~~~~~~~~~~~~~~~~
  271 |          mass_matrix,
      |          ~~~~~~~~~~~~               
  272 |          (const Function<dim> *)0,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~  
  273 |          constraints);
      |          ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:324:8: note: candidate: 
‘template<int dim, int spacedim, class number> void 
dealii::MatrixCreator::create_mass_matrix(const 
dealii::hp::MappingCollection<dim, spacedim>&, const 
dealii::hp::DoFHandler<dim, spacedim>&, const 
dealii::hp::QCollection<dim>&, dealii::SparseMatrix<typename 
dealii::numbers::NumberTraits<Number>::real_type>&, const 
dealii::Function<spacedim, number>&, dealii::Vector<number>&, const 
dealii::Function<spacedim, typename 
dealii::numbers::NumberTraits<Number>::real_type>*, const 
dealii::ConstraintMatrix&)’
  324 |   void create_mass_matrix (const 
hp::MappingCollection<dim,spacedim> &mapping,
      |        ^~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:324:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:269:36: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::hp::MappingCollection<dim, spacedim>’
  269 |   MatrixCreator::create_mass_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  270 |                        quadrature_collection,
      |                        ~~~~~~~~~~~~~~~~~~~~~~
  271 |          mass_matrix,
      |          ~~~~~~~~~~~~               
  272 |          (const Function<dim> *)0,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~  
  273 |          constraints);
      |          ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:337:8: note: candidate: 
‘template<int dim, int spacedim, class number> void 
dealii::MatrixCreator::create_mass_matrix(const dealii::hp::DoFHandler<dim, 
spacedim>&, const dealii::hp::QCollection<dim>&, 
dealii::SparseMatrix<typename 
dealii::numbers::NumberTraits<Number>::real_type>&, const 
dealii::Function<spacedim, number>&, dealii::Vector<number>&, const 
dealii::Function<spacedim, typename 
dealii::numbers::NumberTraits<Number>::real_type>*, const 
dealii::ConstraintMatrix&)’
  337 |   void create_mass_matrix (const hp::DoFHandler<dim,spacedim> &dof,
      |        ^~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:337:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:269:36: note:   
‘dealii::Quadrature<2>’ is not derived from ‘const 
dealii::hp::QCollection<dim>’
  269 |   MatrixCreator::create_mass_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  270 |                        quadrature_collection,
      |                        ~~~~~~~~~~~~~~~~~~~~~~
  271 |          mass_matrix,
      |          ~~~~~~~~~~~~               
  272 |          (const Function<dim> *)0,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~  
  273 |          constraints);
      |          ~~~~~~~~~~~~               
/home/pushkar/examples/step-26/step-26.cc:276:39: error: no matching 
function for call to ‘create_laplace_matrix(dealii::hp::DoFHandler<2, 2>&, 
dealii::Quadrature<2>&, dealii::SparseMatrix<double>&, const 
dealii::Function<2, double>*, dealii::ConstraintMatrix&)’
  276 |   MatrixCreator::create_laplace_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  277 |                           quadrature_collection,
      |                           ~~~~~~~~~~~~~~~~~~~~~~
  278 |             laplace_matrix,
      |             ~~~~~~~~~~~~~~~            
  279 |             (const Function<dim> *)0,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~  
  280 |             constraints);
      |             ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:444:8: note: candidate: 
‘template<int dim, int spacedim> void 
dealii::MatrixCreator::create_laplace_matrix(const dealii::Mapping<dim, 
spacedim>&, const dealii::DoFHandler<dim, spacedim>&, const 
dealii::Quadrature<dim>&, dealii::SparseMatrix<double>&, const 
dealii::Function<spacedim>*, const dealii::ConstraintMatrix&)’
  444 |   void create_laplace_matrix (const Mapping<dim, spacedim>   
&mapping,
      |        ^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:444:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:276:39: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::Mapping<dim, spacedim>’
  276 |   MatrixCreator::create_laplace_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  277 |                           quadrature_collection,
      |                           ~~~~~~~~~~~~~~~~~~~~~~
  278 |             laplace_matrix,
      |             ~~~~~~~~~~~~~~~            
  279 |             (const Function<dim> *)0,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~  
  280 |             constraints);
      |             ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:456:8: note: candidate: 
‘template<int dim, int spacedim> void 
dealii::MatrixCreator::create_laplace_matrix(const dealii::DoFHandler<dim, 
spacedim>&, const dealii::Quadrature<dim>&, dealii::SparseMatrix<double>&, 
const dealii::Function<spacedim>*, const dealii::ConstraintMatrix&)’
  456 |   void create_laplace_matrix (const DoFHandler<dim,spacedim> &dof,
      |        ^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:456:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:276:39: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::DoFHandler<dim, spacedim>’
  276 |   MatrixCreator::create_laplace_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  277 |                           quadrature_collection,
      |                           ~~~~~~~~~~~~~~~~~~~~~~
  278 |             laplace_matrix,
      |             ~~~~~~~~~~~~~~~            
  279 |             (const Function<dim> *)0,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~  
  280 |             constraints);
      |             ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:481:8: note: candidate: 
‘template<int dim, int spacedim> void 
dealii::MatrixCreator::create_laplace_matrix(const dealii::Mapping<dim, 
spacedim>&, const dealii::DoFHandler<dim, spacedim>&, const 
dealii::Quadrature<dim>&, dealii::SparseMatrix<double>&, const 
dealii::Function<spacedim>&, dealii::Vector<double>&, const 
dealii::Function<spacedim>*, const dealii::ConstraintMatrix&)’
  481 |   void create_laplace_matrix (const Mapping<dim, spacedim>   
&mapping,
      |        ^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:481:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:276:39: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::Mapping<dim, spacedim>’
  276 |   MatrixCreator::create_laplace_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  277 |                           quadrature_collection,
      |                           ~~~~~~~~~~~~~~~~~~~~~~
  278 |             laplace_matrix,
      |             ~~~~~~~~~~~~~~~            
  279 |             (const Function<dim> *)0,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~  
  280 |             constraints);
      |             ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:495:8: note: candidate: 
‘template<int dim, int spacedim> void 
dealii::MatrixCreator::create_laplace_matrix(const dealii::DoFHandler<dim, 
spacedim>&, const dealii::Quadrature<dim>&, dealii::SparseMatrix<double>&, 
const dealii::Function<spacedim>&, dealii::Vector<double>&, const 
dealii::Function<spacedim>*, const dealii::ConstraintMatrix&)’
  495 |   void create_laplace_matrix (const DoFHandler<dim,spacedim> &dof,
      |        ^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:495:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:276:39: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::DoFHandler<dim, spacedim>’
  276 |   MatrixCreator::create_laplace_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  277 |                           quadrature_collection,
      |                           ~~~~~~~~~~~~~~~~~~~~~~
  278 |             laplace_matrix,
      |             ~~~~~~~~~~~~~~~            
  279 |             (const Function<dim> *)0,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~  
  280 |             constraints);
      |             ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:508:8: note: candidate: 
‘template<int dim, int spacedim> void 
dealii::MatrixCreator::create_laplace_matrix(const 
dealii::hp::MappingCollection<dim, spacedim>&, const 
dealii::hp::DoFHandler<dim, spacedim>&, const 
dealii::hp::QCollection<dim>&, dealii::SparseMatrix<double>&, const 
dealii::Function<spacedim>*, const dealii::ConstraintMatrix&)’
  508 |   void create_laplace_matrix (const 
hp::MappingCollection<dim,spacedim> &mapping,
      |        ^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:508:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:276:39: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::hp::MappingCollection<dim, spacedim>’
  276 |   MatrixCreator::create_laplace_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  277 |                           quadrature_collection,
      |                           ~~~~~~~~~~~~~~~~~~~~~~
  278 |             laplace_matrix,
      |             ~~~~~~~~~~~~~~~            
  279 |             (const Function<dim> *)0,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~  
  280 |             constraints);
      |             ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:520:8: note: candidate: 
‘template<int dim, int spacedim> void 
dealii::MatrixCreator::create_laplace_matrix(const 
dealii::hp::DoFHandler<dim, spacedim>&, const 
dealii::hp::QCollection<dim>&, dealii::SparseMatrix<double>&, const 
dealii::Function<spacedim>*, const dealii::ConstraintMatrix&)’
  520 |   void create_laplace_matrix (const hp::DoFHandler<dim,spacedim> 
&dof,
      |        ^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:520:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:276:39: note:   
‘dealii::Quadrature<2>’ is not derived from ‘const 
dealii::hp::QCollection<dim>’
  276 |   MatrixCreator::create_laplace_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  277 |                           quadrature_collection,
      |                           ~~~~~~~~~~~~~~~~~~~~~~
  278 |             laplace_matrix,
      |             ~~~~~~~~~~~~~~~            
  279 |             (const Function<dim> *)0,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~  
  280 |             constraints);
      |             ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:531:8: note: candidate: 
‘template<int dim, int spacedim> void 
dealii::MatrixCreator::create_laplace_matrix(const 
dealii::hp::MappingCollection<dim, spacedim>&, const 
dealii::hp::DoFHandler<dim, spacedim>&, const 
dealii::hp::QCollection<dim>&, dealii::SparseMatrix<double>&, const 
dealii::Function<spacedim>&, dealii::Vector<double>&, const 
dealii::Function<spacedim>*, const dealii::ConstraintMatrix&)’
  531 |   void create_laplace_matrix (const 
hp::MappingCollection<dim,spacedim> &mapping,
      |        ^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:531:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:276:39: note:   
‘dealii::hp::DoFHandler<2, 2>’ is not derived from ‘const 
dealii::hp::MappingCollection<dim, spacedim>’
  276 |   MatrixCreator::create_laplace_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  277 |                           quadrature_collection,
      |                           ~~~~~~~~~~~~~~~~~~~~~~
  278 |             laplace_matrix,
      |             ~~~~~~~~~~~~~~~            
  279 |             (const Function<dim> *)0,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~  
  280 |             constraints);
      |             ~~~~~~~~~~~~               
In file included from /home/pushkar/examples/step-26/step-26.cc:47:
/usr/local/include/deal.II/numerics/matrix_tools.h:545:8: note: candidate: 
‘template<int dim, int spacedim> void 
dealii::MatrixCreator::create_laplace_matrix(const 
dealii::hp::DoFHandler<dim, spacedim>&, const 
dealii::hp::QCollection<dim>&, dealii::SparseMatrix<double>&, const 
dealii::Function<spacedim>&, dealii::Vector<double>&, const 
dealii::Function<spacedim>*, const dealii::ConstraintMatrix&)’
  545 |   void create_laplace_matrix (const hp::DoFHandler<dim,spacedim> 
&dof,
      |        ^~~~~~~~~~~~~~~~~~~~~
/usr/local/include/deal.II/numerics/matrix_tools.h:545:8: note:   template 
argument deduction/substitution failed:
/home/pushkar/examples/step-26/step-26.cc:276:39: note:   
‘dealii::Quadrature<2>’ is not derived from ‘const 
dealii::hp::QCollection<dim>’
  276 |   MatrixCreator::create_laplace_matrix(dof_handler,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  277 |                           quadrature_collection,
      |                           ~~~~~~~~~~~~~~~~~~~~~~
  278 |             laplace_matrix,
      |             ~~~~~~~~~~~~~~~            
  279 |             (const Function<dim> *)0,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~  
  280 |             constraints);
      |             ~~~~~~~~~~~~               
/home/pushkar/examples/step-26/step-26.cc: In instantiation of ‘double 
Step26::BoundaryValues<dim>::value(const dealii::Point<dim>&, unsigned int) 
const [with int dim = 2]’:
/home/pushkar/examples/step-26/step-26.cc:145:10:   required from here
/home/pushkar/examples/step-26/step-26.cc:145:56: warning: unused parameter 
‘p’ [-Wunused-parameter]
  145 |   double BoundaryValues<dim>::value (const Point<dim> &p,
      |                                      ~~~~~~~~~~~~~~~~~~^
/home/pushkar/examples/step-26/step-26.cc: In instantiation of ‘double 
Step26::InitialCondition<dim>::value(const dealii::Point<dim>&, unsigned 
int) const [with int dim = 2]’:
/home/pushkar/examples/step-26/step-26.cc:138:10:   required from here
/home/pushkar/examples/step-26/step-26.cc:138:58: warning: unused parameter 
‘p’ [-Wunused-parameter]
  138 |   double InitialCondition<dim>::value (const Point<dim> &p,
      |                                        ~~~~~~~~~~~~~~~~~~^
make[2]: *** [CMakeFiles/step-26.dir/build.make:82: 
CMakeFiles/step-26.dir/step-26.cc.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:183: CMakeFiles/step-26.dir/all] Error 2
make: *** [Makefile:103: all] Error 2

In this regard , Any header will be beneficial.



On Friday, December 4, 2020 at 3:26:16 PM UTC+5:30 [email protected] 
wrote:

> Dear deal.II community,
>
> I ran into error while compilation which I am not able to decipher in 
> which case I look forward to your help . The output I encountered on 
> executing "make all" : 
>
> 15:24:23 **** Build of project step-26-Debug@step-26 ****
> /usr/bin/make all 
> /snap/cmake/715/bin/cmake -S/home/pushkar/examples/step-26 
> -B/home/pushkar/examples/step-26 --check-build-system 
> CMakeFiles/Makefile.cmake 0
> /snap/cmake/715/bin/cmake -E cmake_progress_start 
> /home/pushkar/examples/step-26/CMakeFiles 
> /home/pushkar/examples/step-26//CMakeFiles/progress.marks
> /usr/bin/make  -f CMakeFiles/Makefile2 all
> make[1]: Entering directory '/home/pushkar/examples/step-26'
> /usr/bin/make  -f CMakeFiles/step-26.dir/build.make 
> CMakeFiles/step-26.dir/depend
> make[2]: Entering directory '/home/pushkar/examples/step-26'
> cd /home/pushkar/examples/step-26 && /snap/cmake/715/bin/cmake -E 
> cmake_depends "Unix Makefiles" /home/pushkar/examples/step-26 
> /home/pushkar/examples/step-26 /home/pushkar/examples/step-26 
> /home/pushkar/examples/step-26 
> /home/pushkar/examples/step-26/CMakeFiles/step-26.dir/DependInfo.cmake 
> --color=
> make[2]: Leaving directory '/home/pushkar/examples/step-26'
> /usr/bin/make  -f CMakeFiles/step-26.dir/build.make 
> CMakeFiles/step-26.dir/build
> make[2]: Entering directory '/home/pushkar/examples/step-26'
> [ 50%] Linking CXX executable step-26
> /snap/cmake/715/bin/cmake -E cmake_link_script 
> CMakeFiles/step-26.dir/link.txt --verbose=1
> /usr/bin/c++ -rdynamic  -rdynamic -fuse-ld=gold -pthread -ggdb 
> CMakeFiles/step-26.dir/step-26.cc.o -o step-26  -Wl,-rpath,/usr/local/lib 
> /usr/local/lib/libdeal_II.g.so.9.0.0 -lpthread -lm -ldl -lopenblas 
> -lgfortran -lquadmath -lm -lc -lgcc_s -lgcc -ldl -lz -lrt 
> /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o:function 
> _start: error: undefined reference to 'main'
> collect2: error: ld returned 1 exit status
> make[2]: *** [CMakeFiles/step-26.dir/build.make:106: step-26] Error 1
> make[1]: *** [CMakeFiles/Makefile2:183: CMakeFiles/step-26.dir/all] Error 2
> make: *** [Makefile:103: all] Error 2
> make[2]: Leaving directory '/home/pushkar/examples/step-26'
> make[1]: Leaving directory '/home/pushkar/examples/step-26'
> "/usr/bin/make all" terminated with exit code 2. Build might be incomplete.
>
> 15:24:23 Build Failed. 3 errors, 0 warnings. (took 615ms)
>
> Any help in this regard will be beneficial
>
> Regards
> Pushkar
>
>

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