GRP_VALID - Determine if a group identifier is valid

Description:

Argument VALID is returned .TRUE. if the group identified by IGRP is valid, and is returned .FALSE. otherwise.

Invocation:

CALL GRP_VALID( IGRP, VALID, STATUS )

Arguments:

IGRP = INTEGER (Given)

A GRP identifier.

VALID = LOGICAL (Returned)

The status of the group.

STATUS = INTEGER (Given and Returned)

The global status.