SAP Message WA160 - No change document object for business object type &1

Diagnosis
You want to create an event linkage for a business object type with achange document object. However, no compatible change document objectis available for the specified business object type.

System Response
The linkage cannot be defined.

Procedure
The business object type required may have a change document objectwith an incompatible key. Enter a problem message and send it to SAP(BC-BMT-WFM). Specify all information regarding the business objecttype/change document object (name, key structure, etc.) in this problemmessage.
There may be no change document object for the business object typespecified. If a change document object is to be defined, contact SAPwith a problem message as well.