Please review the draft that modifies the errors ERR_PENDING into ERR_PROC_FAILED_PENDING The name of the error code is rather long. Shorter error name propositions are welcome. MPI_ERR_WOULDBLOCK ??? For references, and this was the only though worthy issue for this change, the document intentionally doesn’t specify what the implementation behavior must be for ERR_PENDING when ERR_PROC_FAILED_PENDING could be raised (or the contrary). MPI_Irecv(ANY_SOURCE, comm1, &r1) MPI_Irecv(ANY_SOURCE, comm1, &r2) MPI_WaitAll(r1,r2) can legitimately result in err_status(r1): PROC_FAILED_PENDING err_status(r2): PROC_FAILED_PENDING err_status(r1): PENDING err_status(r2): PROC_FAILED_PENDING err_status(r1): PROC_FAILED_PENDING err_status(r1): PENDING