--- src/mpe2/src/collchk/src/same_op.c~ 2007-11-02 23:50:19.000000000 +0100 +++ src/mpe2/src/collchk/src/same_op.c 2009-02-09 08:34:51.000000000 +0100 @@ -51,7 +51,7 @@ MPI_Comm_size(comm, &s); sprintf(err_str, COLLCHK_NO_ERROR_STR); - sprintf(op_str, CollChk_get_op_string(op)); + sprintf(op_str, "%s", CollChk_get_op_string(op)); if (r == 0) { /* send the name of the op to the other processes */