Confirm the sample unit of measure &

What causes this issue?

You entered a sample unit of measure that is neither a unit of weight,
a unit of volume, nor a unit that has no dimension.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Either confirm this message by selecting ENTER or
change the sample unit of measure that you entered.

Error message extract from SAP system. Copyright SAP SE.