Creating sales orders in background & Material Exclusion

Hello All, we have restricted the sale of some particular material to specific customers via Material Exclusion (transaction VB01)  but now, we are having problems creating sales orders via BAPI_SALESORDER_CREATEFROMDAT2  using incoming (external) data. Because the
material exclusion raises  a message of type Error, so system rejects the whole order.

We would need system to save the new sales order with the rest of items instead. Question, is there any posibility to change the type of the error to W and/or  to have that item (where the restricted material is) rejected? Has anybody managed a similar issue? I am interested inanysolution!

Thanks in advance, Carlota