UNBW Material in a third-party Sales Order (error: account determination)

Hy @ll,

we receive the following error message when entering a non valuated material (MTART UNBW) in a third-party sales order item.

System is asking for the calculated budget and after the manual entry of the budget the following error message appears.

(the schedule line customizing populates the account assignment category X for the PR)

"Not possible to determine a consumption account".

any ideas? my assumption is that account determination OBYC can not be error source, because it´s a non-valuated material...

many thanks,.

Gregor