SAP Message /SAPSLL/PLUGINR3835 - Customs warehouse transfer is not allowed; see long text

Diagnosis
To transfer customs warehouse material &V1&, you have to specify aplant/storage location combination in the stock transport order thatrefers to customs ID &V2& or no customs ID at all.

System Response
The goods issue posting is not allowed.

Procedure
Enter a plant/storage location combination for item &V4& in purchaseorder &V3&.