Changes and New Features in V1.1

The following changes have occurred in the GRP_ system since version 1.0:

1. A new routine GRP_HEAD has been introduced to simplify the task of finding the head of an owner-slave chain.
2. Routines GRP_GROUP and GRP_GRPEX
   • Argument FLAG is now returned false if an error occurs.
   • If an error occurs, then argument SIZE is returned equal to the supplied size of the group identified by argument IGRP2. If the group has zero size on entry then argument SIZE is returned equal to one.