Dear Sanil,
Thanks for your response , but this msg. is not related to CO related documents , these are clearing document entries of AB document type only , which were posted in 2011, which system says have some data inconsistency , I think we need to rectify these documents to go ahead.
I have you gone through the attached error document screen shots, If you get any additional clue please let me know.
Thanks & Regards
Gyanendra