Hi Sreenivasa,
Did you delete the chart of account by following Srinu's instruction? I am facing a similar situation - when I am deleting SAP delivered chart of accounts GKR, I get the same message "COA is used in special purpose ledger". I followed the steps in Srinus' reply, but am still getting the same message. We do not have any Z table in GCDE.
If you could share how you delete the COA, it would be very appreciated!
Thanks,
Jennifer