Message SAP /CWM/MD027 - Material &1 in plant &2 for customer &3 with consignment stock

Diagnosis
You are trying to define a parallel unit of measure for a material orto reset the definition, although consignment stock already exists forthe material.

System Response
You can only make this type of change if no stock exists for thematerial.

Procedure
Use transaction MMBE or /CWM/STOCK to check and clear existing stock.You can then make the necessary change and repost the stock.