The supplied parameter is used to get a GRP group expression (see SUN/150 ) holding a list of existing NDFs (the syntax of the group expression is defined by the current default GRP control characters). If the group expression is flagged, then the current parameter value is cancelled, the string supplied in TEXT is displayed (if it is not blank) and another group expression is obtained. The NDFs specified by the second group expression are added to the group holding the NDFs specified by the first group expression. The group continues to be expanded in this way until a group expression is obtained which is not flagged, or a null value is given, or the limit on the number of NDFs (MAXSIZ) is reached. If any of the specified NDFs does not exist, the user is warned, and re-prompted. If the final group contains more than MAXSIZ NDFs, then all but the first MAXSIZ NDFs are removed from the group. The user is warned if this happens. If MAXSIZ is supplied with the value zero no limit is imposed on the number of NDFs within the group. If the final group contains fewer than the minimum number of NDFs specified by argument MINSIZ, then the user is asked to supply more NDFs. All messages issued by this routine have a priority level of MSG__NORM.

CALL KPG1_RGNDF( PARAM, MAXSIZ, MINSIZ, TEXT, IGRP, SIZE, STATUS )

PARAM = CHARACTER $\ast$ ( $\ast$ ) (Given)

MAXSIZ = INTEGER (Given)

MINSIZ = INTEGER (Given)

TEXT = CHARACTER $\ast$ ( $\ast$ ) (Given)

IGRP = INTEGER (Returned)

SIZE = INTEGER (Returned)

STATUS = INTEGER (Given and Returned)