SAP Message VSB268 - Unit of measure &1 in transferred item is not an ISO code

Diagnosis
No correct (ISO) unit of measure was determined in the item.

System Response
The item cannot be processed without a valid unit of measure.

Procedure
You can change the transferred ISO unit of measure using the "ProcessErrors" function.
You must ensure the following:
Incorrect entries regarding the unit of measure is an error that has tobe eliminated. Either your customer has not transferred the units ofmeasure correctly, or the ISO units of measure in your SAP System arenot correct.
If you specify a unit of measure using the "Process Errors" function, itmust be a valid ISO unit of measure (for example, "PCE"). You mustensure that this is a correct unit of measure, and that this is eitherused as a base or sales unit of measure for this material.