Change Log Deletion

Hi sapian,

i have a BW system on HANA i am going to delete the requests from Change Log Table for Older than 3 days ...I have checked with all the check boxes which are available in the menu, the process chain is executing successfully , but the contents of the change Log are not deleted..

                    Can you suggest me whether it is possible to delete the contents of Change Log using process chain, if yes explain me the steps with screenshots.

Thanks in advance

Kishor