Hello Mike, As shown in https://trac.mpich.org/projects/mpich/ticket/2088, the issue has been resolved recently. Can you try the current MPICH master or 3.2b4 (http://www.mpich.org/downloads/)? Thanks, Sangmin On Jul 31, 2015, at 1:40 PM, Michael L. Stokes <[email protected]<mailto:[email protected]>> wrote: I'm running mpich-3.1.2/test/mpi/io/resized2 with the output file size is 20, should be 16 newbuf[0] is 55, should be 10, newbuf[1] is 10, should be 55, newbuf[2] is 55, should be 55, newbuf[3] is 55, should be 20 Found 2 errors I have run this test case across a number of machines. It is listed as belonging to ticket2088. Can anyone tell me if this is an unresolved issue or some error on my part? Thanks Mike _______________________________________________ discuss mailing list [email protected]<mailto:[email protected]> To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss