[Dune] alugrid problem

[Arya Fallahi]

Dear Dune,

I am currently stuck with a strange parallelization problem in ALUGrid.
When I run the code on one processor everything is fine. However, after
running on just two processors, the following error appears:

dgtd-max: /afs/
desy.de/user/a/afallahi/workspace/dune-alugrid/dune/alugrid/common/defaultindexsets.hh:228:
Dune::DefaultIndexSet<GridImp, IteratorImp>::IndexType
Dune::DefaultIndexSet<GridImp, IteratorImp>::index(const typename
GridImp::Codim<cd>::Entity&) const [with int cd = 0; GridImp =
Dune::ALU3dGrid<(Dune::ALU3dGridElementType)4u, Dune::ALUGridMPIComm>;
IteratorImp = Dune::EntityIterator<0, const
Dune::ALU3dGrid<(Dune::ALU3dGridElementType)4u, Dune::ALUGridMPIComm>,
Dune::ALU3dGridLeafIterator<0, (Dune::PartitionIteratorType)4u, const
Dune::ALU3dGrid<(Dune::ALU3dGridElementType)4u, Dune::ALUGridMPIComm> > >;
Dune::DefaultIndexSet<GridImp, IteratorImp>::IndexType = unsigned int;
typename GridImp::Codim<cd>::Entity = Dune::Entity<0, 3, const
Dune::ALU3dGrid<(Dune::ALU3dGridElementType)4u, Dune::ALUGridMPIComm>,
Dune::ALU3dGridEntity>]: Assertion `indexContainer( cd )[ en ].index() >=
0' failed.

There are also some strange lines in the execution of the code:

DefaultIndexSet[ 0 ]: 352631 s | g 314280
DefaultIndexSet[ 0 ]: 59350 s | g 46407
DefaultIndexSet[ -1 ]: 59350 s | g 46407

The mesh creation with gmsh runs pretty fine. There seems to be a problem
with index sets. I have no idea about the returned error. Therefore, I can
not begin with debugging my code. I will be thankful if you let me know
about the possible origins of this error message.

Thanks in advance
Arya
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