SAP Message WU491 - Conversion from purchase to sales unit unsuccessful

Diagnosis
A price calculation is needed for the creation of pricing conditions. Apurchase price and sales price with the same unit are required forthis. Conversion of the purchasing unit into the sales unit failedbecause the system did not find an appropriate conversion factor.

System Response
The whole item is not activated. The activation indicator is set to D =incorrect.

Procedure
Enter an appropriate conversion factor in material master maintenance.