Thanks for all the effort, I entered the invoice number on the first screen for billing and clicked on the green flag to realease to accounting and the following error occured:
Error: Account 400000 requires an assignment to a CO object.
Again after creating invoice and i want to view the accounting doc. i am told that no accounting docs has been created, and so no document is created that could be released to accounting.
please advice on next step. Tanx once again.