Dear Siva
The error presented to you is for variance calculation and not for WIP. TECO and DLV is required only for variance and not for WIP. REL status is sufficient for WIP calculation and posting.
Secondly as you say that you have posted WIP for 3 times in the same period. for this you can reverse the two entries in KO88-main menu-reverse.
Regards
Rajneesh Saxena