Message SAP XU057 - Quantity in base Un is re-calculated --> long text

Diagnosis
You have entered quantities in alternative units of measure and baseunits of measure for a material that is managed in product quantities.

System Response
The quantity in base units of measure is calculated from the quantityin alternative units of measure.

Procedure
By entering a quantity in one unit of measure, you can have itcalculated in the other unit of measure.
By choosing Change header net quantity..., you can enter quantitiesboth in product units and in base units of measure. This means that youcan change the conversion factor of the production order in thematerial master record.
This changed conversion factor between product units and base units ofmeasure can be used to determine the conversion factor of the batchproduced when goods are received for a production order.