Cause: The source queue specified for the event based job or event based schedule was either not found or was of the wrong type. See the solution below.
Error solution: Check if the queue exists. If it does make sure it is a multiple consumer queue and it is a post 8.1 compatible queue. Single consumer queues and old-style queues cannot be used as event source queues.
Database version: Oracle 11g Release 2 (11.2)