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The following task has a new comment added:

FS#267 - MPI exit with error: MPI_Op_free after MPI_FINALIZE
User who did this - Christoph GrĂ¼ninger (gruenich)

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Markus Blatt commented on the DuMuX mailing list:

Are you may creating a Dune::MPIHelper and an ALUGrid in your main method? If 
ALUGrid creates some custom MPI operators and frees them in the destructor, 
then one needs to make sure that this destructor is called after the one of the 
MPIHelper (which calls MPI_Finalize). An easy approach would be to set up the 
MPIHelper in the main method and do the ALUGrid construction in a method that 
is called afterwards.
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