How To Fix LB157 - Prop./prod. UoM and base UoM are identical for unit of measurement &

SAP Error Message - Details

• Message type: E = Error

• Message class: LB - Logistics: Batch - Management

• Message number: 157

• Message text: Prop./prod. UoM and base UoM are identical for unit of measurement &

What causes this issue?

The proportion or product unit and the base unit of measure must be
different.
The proportion or product unit must not be equal to the base unit of
measure in the material.

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?

Please check the units of measure.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message LB157 - Prop./prod. UoM and base UoM are identical for unit of measurement & ?

  The SAP error message LB157 indicates that there is an issue with the unit of measurement (UoM) configuration for a material. Specifically, it means that the "proportional unit of measure" (Prop. UoM) and the "base unit of measure" (Base UoM) are set to be identical for a particular unit of measurement, which is not allowed in SAP.
  Cause:
  
  Configuration Error: The error typically arises when the material master data is incorrectly configured. The proportional unit of measure should be different from the base unit of measure.
  Material Master Settings: This can happen if the material master record has been set up incorrectly, particularly in the "Units of Measure" section.
  Data Entry Mistake: During the creation or modification of the material master, the user may have inadvertently set the proportional UoM to be the same as the base UoM.
  
  Solution:
  To resolve this error, you need to check and correct the unit of measurement settings in the material master:
  
  
  Access Material Master:
  
  Use transaction code MM02 (Change Material) or MM03 (Display Material) to access the material master record.
  
  
  
  Navigate to Units of Measure:
  
  Go to the "Basic Data" or "Purchasing" view (depending on your configuration) where the units of measure are defined.
  
  
  
  Check UoM Settings:
  
  Look for the section that defines the base unit of measure and the proportional unit of measure.
  Ensure that the proportional unit of measure is different from the base unit of measure. If they are the same, change the proportional UoM to a different value that makes sense for your business process.
  
  
  
  Save Changes:
  
  After making the necessary changes, save the material master record.
  
  
  
  Test the Changes:
  
  Try to perform the action that previously triggered the error to ensure that it has been resolved.
  
  
  
  Related Information:
  
  Units of Measure in SAP: Understanding how units of measure work in SAP is crucial. The base unit of measure is the primary unit in which the material is managed, while the proportional unit of measure is used for conversions in specific scenarios (e.g., when dealing with packaging).
  Material Master Views: Familiarize yourself with the different views of the material master, as the UoM settings can be found in various sections depending on the material type and the business processes involved.
  SAP Documentation: Refer to SAP Help documentation for detailed information on material master data and units of measure configuration.
  
  If the issue persists after making the changes, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in material management.