It seems the implementation of MPI_Add_error_class() is out of sync with the definition of MPI_ERR_LASTCODE.
Please review the list of error classes in mpi.h and the code in this file: https://bitbucket.org/ompiteam/ompi-svn-mirror/src/v1.8/ompi/errhandler/errcode.c BTW, in that file, all the MPI_T_ERR_XXX are not handled. The MPI-3 standard says they should be treated as other MPI error classes. Trying to get an error string out of them (eg. MPI_T_ERR_MEMORY) generates an error. [dalcinl@kw2060 openmpi]$ cat add_error_class.c #include <stdio.h> #include <mpi.h> int main(int argc, char *argv[]) { int errorclass,*lastused,flag; MPI_Init(&argc, &argv); MPI_Add_error_class(&errorclass); MPI_Comm_get_attr(MPI_COMM_WORLD, MPI_LASTUSEDCODE, &lastused, &flag); printf("errorclass:%d lastused:%d MPI_ERR_LASTCODE:%d\n", errorclass, *lastused, MPI_ERR_LASTCODE); MPI_Finalize(); return 0; } [dalcinl@kw2060 openmpi]$ mpicc add_error_class.c [dalcinl@kw2060 openmpi]$ ./a.out errorclass:54 lastused:54 MPI_ERR_LASTCODE:71 [dalcinl@kw2060 openmpi]$ cat error_string.c #include <stdio.h> #include <mpi.h> int main(int argc, char *argv[]) { char errorstring[MPI_MAX_ERROR_STRING]; int slen; MPI_Init(&argc, &argv); MPI_Error_string(MPI_T_ERR_MEMORY, errorstring, &slen); printf("errorclass:%d errorstring:%s\n", MPI_T_ERR_MEMORY, errorstring); MPI_Finalize(); return 0; } [dalcinl@kw2060 openmpi]$ mpicc error_string.c [dalcinl@kw2060 openmpi]$ ./a.out [kw2060:20883] *** An error occurred in MPI_Error_string [kw2060:20883] *** reported by process [140737332576257,0] [kw2060:20883] *** on communicator MPI_COMM_WORLD [kw2060:20883] *** MPI_ERR_ARG: invalid argument of some other kind [kw2060:20883] *** MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort, [kw2060:20883] *** and potentially your MPI job) -- Lisandro Dalcin --------------- CIMEC (UNL/CONICET) Predio CONICET-Santa Fe Colectora RN 168 Km 472, Paraje El Pozo 3000 Santa Fe, Argentina Tel: +54-342-4511594 (ext 1016) Tel/Fax: +54-342-4511169
