Diagnosis
You tried to delete a replication object in the Administration Console.This is only allowed if there are no publications for the replicationobject to be deleted.

Procedure
Select the object type Replication objects in the AdministrationConsole. Expand the tree for the replication object to be deleted.There you receive a list of all publications linked to your replicationobject. Select a publication by doubleclick and choose Delete inthe application toolbar. Do this for all shown publications.
Attention: A publication can only be deleted if there are nosubscriptions for it on any client of your system.