Earmarked funds in Automatic Posting

Hi All,

we are using the earmarked funds for our Actual Commitments, we are creating the earmarked fund for Fund, WBS element and GL Account, which further derives the Funded Program, Fund Center and Commitment Item.

During the Manual Posting through FB50 we assigning the Earmarked Funds in expenditure line item, system is filling the WBS element field from Earmarked Fund and it is getting posted.

but in case of Automatic Posting like Foreign currency Valuations we having the Substitution to fill with Earmarked fund in expenditure line item, but the system could not able to post, Error is "Assign Cost object to the GL Account".

request you to suggest.

Thanks

Prashanth Ragi.