Change Log deletion Variant not working in process chain

Hi Friends,

We have been experiencing problems in deleting change log data for few targets in production system. The change log data is not getting deleted from the Change logs for respective targets via standard process available for Process chains.

Has any one experienced this before & if yes then what's the solution?

Some important points:

We recently upgraded from SAP BW 7.0 to SAP BW 7.1. Immediately after upgrade change log deletions via standard variant worked fine for a months time but after that the change log requests are not getting deleted for some reason.

While searching online i came across a wiki blog which pointed out certain steps which are already applied to our system.

http://wiki.sdn.sap.com/wiki/display/BOBJ/Change+Log+and+PSA+Variant+does+not+delete+the+Change+Log+and+PSA+requests

Thanks

Pawan