Hmm... it seems to me that you should not hit exactly this error
because of
this logic:
// check that we have the required solver:
std::string solver;
solver = input.next(solver);
if (solver == "mumps")
{
#ifndef LIBMESH_PETSC_HAVE_MUMPS
libmesh_example_requires(false, "PETSc compiled with MUMPS
support");
#endif
}
else if (solver == "superlu")
{
#ifndef LIBMESH_PETSC_HAVE_SUPERLU_DIST
libmesh_example_requires(false, "PETSc compiled with SuperLU
support");
#endif
}
else
{
libMesh::err << "Error: Solver " << solver << " is unknown."
<< std::endl;
return 1;
}
i.e. you should hit the "libmesh_example_requires" in the first
if-block.
But perhaps you are using an older version of libmesh which doesn't
have
this check.
Either way, it's not fatal error with your libmesh build, just an
example
that requires a specific solver that you don't have in your build of
PETSc.
Thank you for your answer, John. I am using v1.5.1 (as suggested on
another e-mail). How do I set flags to configure with MUMPS? Does
--enable-mumps work? Thank you! Have nice holidays :) .
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