int PMPI_Attr_get(MPI_Comm comm, int keyval, void* attr_value, int* flag) {
static int one = 1;
static int zero = 0;
- static int tag_ub = 1000000;
+ static int tag_ub = INT_MAX;
static int last_used_code = MPI_ERR_LASTCODE;
if (comm==MPI_COMM_NULL){