Hi Luca,
Thanks for the response. I recreated the mesh to make sure that there is no
two physical tag for the same object. I found that if I do not set any
physical tag, my code is able to read the mesh without any issue. But when
I am setting 4 different physical tags to 4 parts of the boundary, I am
getting a new error message:
An error occurred in line <2028> of file
</home/krishanu/Google_Drive/dealii/dealii_920/dealii-9.2.0/source/grid/grid_in.cc>
in function
void dealii::GridIn<dim, spacedim>::read_msh(std::istream&) [with int
dim = 2; int spacedim = 2; std::istream = std::basic_istream<char>]
The violated condition was:
cells.size() > 0
Additional information:
(none)
On Monday, 1 March 2021 at 12:18:15 UTC-5 luca....@gmail.com wrote:
> The error message is telling you that you specified more than one physical
> tag for the same object. This is not compatible with deal.II, at the
> moment, as the physical tags are used by deal.II to specify what material
> id (on cells) or boundary id (on faces and possibly edges) to assign to
> each element.
>
> Make sure you only assign a single physical id to each volume (surface),
> and a single physical id to each object on the boundary.
>
> Luca.
>
>
> > On 28 Feb 2021, at 1:40, krishan...@gmail.com <krishan...@gmail.com>
> wrote:
> >
> > I am trying to read a mesh (.msh file) generated by Gmsh (version
> 4.7.1), but getting an error. I am using the following commands:
> >
> > GridIn<dim> grid_in;
> > grid_in.attach_triangulation(triangulation);
> > std::ifstream input_file("ma_mesh3.msh");
> > grid_in.read_msh(input_file);
> >
> > The issue is occurring while executing
> >
> > grid_in.read_msh(input_file)
> >
> > This is the error message:
> >
> > Exception on processing:
> >
> > --------------------------------------------------------
> > An error occurred in line <1534> of file
> </home/krishanu/Google_Drive/dealii/dealii_920/dealii-9.2.0/source/grid/grid_in.cc>
>
> in function
> > void dealii::GridIn<dim, spacedim>::read_msh(std::istream&) [with int
> dim = 2; int spacedim = 2; std::istream = std::basic_istream<char>]
> > The violated condition was:
> > n_physicals < 2
> > Additional information:
> > More than one tag is not supported!
> >
> >
> > Am I doing something wrong, or is there any particular version of Gmsh
> that should be used to generate meshes that are compatible with deal.ii?
> >
> > Thanks for any help or advice.
> >
> >
> >
> > --
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>
>
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