2777422 - Errors when creating a document using external catalog

While creating a shopping cart using an external catalog

You get  error:Product category XXX does not exist,where XXX is product categoryID

or

You get error:Unit of measure YY does not exist, where YY is Unit of measure symbol

or

Product ID not filled when you transfer the products from external catalog to shopping cart document / Purchase order.

SAP Business ByDesign

Product category does not exist,Unit of measure does not exist, Product ID is empty, Unit of measure is empty,product category is missing,Unit of measure is missing,Unit of measure is grayed out,Product ID from external catalog , KBA , product category does not exist , AP-POP-PO , Purchase Order , AP-REQ-IR , Internal Request , AP-PRP , Purchase Request Processing , Problem