SAP Message WTADDI414 - Unit of measure &1 not maintained for material &2

Diagnosis
When defining additionals, you must select a unit ofmeasure of the material to which the additional is tobe assigned. The unit of measure you have selected is not defined forthe material.

System Response
The system will only let you select units of measure that have alreadybeen maintained for the material.

Procedure
Choose one of the units of measure that have already been maintainedor, alternatively, add your desired unit of measure in the materialmaster.

Hints
Ideally, you should only select units of measure in which the materialwill be sold to customers/consumers.