Diagnosis
You have assigned an account assignment object (&V1&). Theassignment is unrestricted, however, the availability of the accountassignment object (&V2&) in the future is not unrestricted.

System Response
If the account assignment object is not valid at a time in the future,for example, when a periodic posting is started, this may result infollow-on errors. In particular, postings cannot be made to this object.

Procedure
Restrict the assignment of the object so that it is actually availableduring the complete assignment duration.