This is a proposal for MPI 2.1, Ballot 4. This is a follow up to: Significance of non-root arguments to MPI_COMM_SPAWN in http://www.cs.uiuc.edu/homes/wgropp/projects/parallel/MPI/mpi-errata/index.h... with mail discussion in http://www.cs.uiuc.edu/homes/wgropp/projects/parallel/MPI/mpi-errata/discuss... The problem may be clarified with the following proposal Proposal for MPI 2.1, Ballot 4: ------------------------------- Add in MPI-2.0, page 88, after line 24: Advice to users. If the non-root processes do not use MPI_ERRCODES_IGNORE, then they have to allocate the appropriate number of entries (see maxproc at root) in the array_of_errcodes although the maxproc argument is unused in non-root processes. (End of advice to users.) ------------------------------- Discussion should be done through the new mailing list mpi-21_at_cs.uiuc.edu. I have sent out this mail with CC through the old general list mpi-21_at_[hidden] Best regards Rolf Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseifner_at_[hidden] High Performance Computing Center (HLRS) . phone ++49(0)711/685-65530 University of Stuttgart . . . . . . . . .. fax ++49(0)711 / 685-65832 Head of Dpmt Parallel Computing . . . www.hlrs.de/people/rabenseifner Nobelstr. 19, D-70550 Stuttgart, Germany . (Office: Allmandring 30)