KB40642: "Object with ID XXXXX and type 55 (Document Definition) is not found in metadata. It may have been deleted. " error appears in DSSErrors.log in MicroStrategy 9.x

SYMPTOM: 
 
Within the DSSErrors.log the following error message will be seen:
 

“Object with ID ‘XXXXX’ and type 55 (Document Definition) is not found in metadata. It may have been deleted.”  

 
CAUSE:
 
If the error message is followed by the error message below, the error message is caused because a subscription is still active for a report/document that is no longer present in the metadata. 
 

“report/document with ID XXXXX not found. Invalidating subscription instance ID XXXXX and its child instances (if any)” 

 
When a document is deleted that still has a subscription using it the error message will appear and immediately following the subscription will become invalid. The product it working as designed. An example of the DSSerror.log can be seen below. 
 
 

2012-06-27 11:25:33.019-05:00 Object with ID 'F7209F9044C0AEF37E08C8B2EF0A1265' and type 55 (Document Definition) is not found in metadata. It may have been deleted.

2012-06-27 11:25:33.175-05:00 NCSGetInstances::hPopulateExtraXMLInfo: report/document with ID F7209F9044C0AEF37E08C8B2EF0A1265 not found. Invalidating subscription instance ID A92678F94BB176065C4AACB416506FD3 and its child instances (if any)