Users may see this error when trying to delete a job:
The References section of a Job's Properties can provide users with information as to where the Job is referenced.
In the screenshot below, notice that this Job is referenced as a Notification Job. The Reference Type and Location is shown. Once a user removes this reference, the user will be allowed to remove the Job.
It is important that JAMS does not have broken References, which is why JAMS prevents objects from being deleted without resolving those References first.