VMS Help DTM, DELETE, GROUP, Restrictions  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   o  You cannot delete a group if it contains any test descriptions
      or other groups, or if it is a subgroup of another group. If
      any test descriptions or groups are still in the group when you
      issue the DELETE GROUP command, Digital Test Manager reports that
      the specified group has not been deleted.