usable_err_msg    193 ompi/errhandler/errhandler_predefined.c     const char* usable_err_msg = unknown_error;
usable_err_msg    223 ompi/errhandler/errhandler_predefined.c     usable_err_msg = (NULL == err_msg) ? unknown_error  : err_msg;
usable_err_msg    239 ompi/errhandler/errhandler_predefined.c                        usable_err_msg,
usable_err_msg    256 ompi/errhandler/errhandler_predefined.c                        usable_err_msg,