hi to all I want to use mpich for running my SUNTANS code when I dont use mpich my example code runs. but when I use mpich this error creates. what's the problem and how can I fix it? thanks in advance Fatal error in PMPI_Gather: Invalid buffer pointer, error stack: PMPI_Gather(856): MPI_Gather(sbuf=0xe176a0, scount=1, MPI_INT, rbuf=0xe176a0, rcount=1, MPI_INT, root=0, comm=0x84000000) failed PMPI_Gather(797): Buffers must not be aliased =================================================================================== = BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES = EXIT CODE: 1 = CLEANING UP REMAINING PROCESSES = YOU CAN IGNORE THE BELOW CLEANUP MESSAGES