Error in FI invoice posting through IDoc

Hi,

I am facing a strange issue with IDoc. Bunch of FI inter company invoices posted by IDocs on batch process. In that few idoc correctly posting the document and few throwing the same error as "Account requires an assignment to a CO objects" and the strange part here is if I run these IDoc by BD87 manually, document gets posted. I am using an exit EXIT_SAPLIEDI_002 to determine the profit center and also could see the profit center is also determined correctly when debugging.

Much appreciated if you could give me some hints to figure out what exactly the cause.

Thanks,

Kalidass.