On Wed, Aug 3, 2016 at 2:06 PM, Harry Pearce <harroontheg...@gmail.com>
wrote:

> The example code I am trying to compile is HPeigenproblems_PZ_8_2_16_2.C.
> This is where I added #include "parallel_algebra.h" and "parallel.h". The
> errors all seem to have to do with things inside header files being "not
> declared in scope" not naming a type,  etc.
>
>  For example:
> In file included from HPeigenproblems_PZ_8_2_16_2.C:4:0:
> /opt/libmesh-1.0.0-rc1/include/libmesh/mesh_generation.h:130:67: error:
> ‘libmesh_nullptr’ was not declared in this scope
>                        QueryElemSubdomainIDBase * elem_subdomain =
> libmesh_nullptr);
>


Hmm... try putting a:

using namespace libMesh;

at the top of your app?  If it's been a while since you last updated
libmesh, your code might not be properly namespaced...

-- 
John
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