SAP Message 6D120 - Transfer posting to G/L account & not permitted

Diagnosis
You are posting an activity with line items that have real estateauxiliary account assignments as well as other G/L account items thatrefer to the input tax account &v1& at least once. This is notpermitted for input tax distribution that takes place in opting companycodes.

System Response
The system has rejected the posting.