Hi, you made a workaround for the MatTranspose problem with one-side communications:
https://bitbucket.org/petsc/petsc-dev/changeset/43e28ef1a420 My code now crashes on MatTranspose in line 2147 of src/mat/impls/aij/mpi/mpiaij.c, as the matrix object is not created but MatSetOption is executed on this matrix. Best regards, Thomas
