Diagnosis
You want business area balance sheets in company code &V1&. Therefore,every asset has to be uniquely assigned to a business area.
However, in screen layout rule &v2& for asset class &v3&, you havesuppressed the business class. As a result, the business class cannotbe entered, and also cannot be copied from reference objects.

System Response
You cannot create any assets in asset class &v3&.

Procedure
Correct the Customizing inconsistency by setting the business area to'ready for input' in screen layout rule &v2&.