SAP Message WG087 - No maximum order qty check possible. Material &, supplying plant &, Un &

Diagnosis
According to the document category, the maximum purchase order quantitymaterial master sales data) should be checked for the issuing plant.Conversion of the unit of measure for the specifiedmaterial and the specified issuing plant failed.

System Response
The purchase order is not forwarded to other vendors.

Procedure
Maintain the corresponding master data for the above material andsupplying plant.