SAP Message RU149 - Dimensions differ between unit entered (&) and op. unit &

Diagnosis
The dimension of the unit you have entered is different to that of theunit of the standard values> in the operation.

System Response
The system checks whether both units have the same dimension. If thisis not the case, processing will not be continued.
Example:
The dimensions time and length are incompatible.
You therefore cannot confirm, for example, 1 meter for anoperation for which 2 hours has been planned.

Procedure
Correct the unit.