If you want to delete a universal group, you should run IRRRID00, specifying the group name, to delete the group and remove all member connections. The DELGROUP command can successfully delete a UNIVERSAL group that has members connected to it because universal group profiles might not contain all connected user IDs in the member list. However, when you delete a universal group, you will receive the ICH05008I informational warning message that the group is a universal group, reminding you to run IRRRID00. For more information about universal groups, see Defining large groups with the UNIVERSAL attribute.

Be sure to execute the resulting REMOVE commands to remove all users from the universal group. If you do not, the profiles of those users will contain residual data regarding the deleted group connection. You should also execute any resulting PERMIT DELETE commands to remove residual entries from access lists that contain the deleted universal group.