To expand on that a bit , this is a common theme for any item that is programmed , so gateways /port networks / announcements etc etc ...before you can delete from the system all associated translations must be removed first .. so if you have an announcement in a vector or vectors you need to remove it from the vectors before you can delete the announcement in CM.As stated the "list usage x " command is your friend in instances like this.
ACSS (UC/SBCE/SM/SME)
Not that they mean a thing anymore , get a brain dump pass the test crash the system.