Hi Trinath
Its very Simple
1. Reverse your COPA doc from KE4S..
a) Enter the SD Billing doc No.s. Comp Code, etc
b) Choose the Option reversal of line items...
c) Execute in TEST MODE and then in update mode
d) Ensure all docs are reversed
e) Once your config is moved to PRD, run KE4S again, with the option "Check for Existing Records" (OR) "Posting without Check" if you are sure that no one has posted the docs into COPA after you have reversed them
Its done!
Enjoy!!!
Ajay M