Hi,
Using create_submesh leads to a crash because Nodes with invalid id are
created. Here is the error from ParallelMesh::node_ptr function
Assertion `_nodes[i]' failed.
Here is the backtrace:
0: libMesh::print_trace(std::ostream&)
1: libMesh::MacroFunctions::report_error(char const*, int, char const*,
char const*)
2: libMesh::ParallelMesh::node_ptr(unsigned int)
3: libMesh::UnstructuredMesh::create_submesh(libMesh::UnstructuredMesh&,
libMesh::MeshBase::const_element_iterator&,
libMesh::MeshBase::const_element_iterator const&) const
The problematic line is unstructured_mesh.C:1056
// Add this node to the new mesh
new_mesh.add_point (old_elem->point(n));
This should be
// Add this node to the new mesh
new_mesh.add_point (old_elem->point(n), n_new_nodes);
Thanks,
Harshad
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