How To Fix BM393 - Units of measurement are assigned to different dimensions

SAP Error Message - Details

• Message type: E = Error

• Message class: BM - Development class BZME - units of measure

• Message number: 393

• Message text: Units of measurement are assigned to different dimensions

What causes this issue?

The unit &V1& is assigned to the dimension &V2& in the measurement unit
table, while the unit &V3& is assigned to the dimension &V4&.
The dimensions are different.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BM393 - Units of measurement are assigned to different dimensions ?

  The SAP error message BM393, which states "Units of measurement are assigned to different dimensions," typically occurs in the context of material management or inventory management when there is a mismatch in the units of measurement (UoM) being used for a particular material or product. This error can arise during various transactions, such as when trying to create or change a material master record, or when performing inventory movements.
  Cause:
  The error is caused by the following scenarios:
  
  Different Dimensions: The units of measurement being used are assigned to different dimensions in the SAP system. For example, if you are trying to convert between weight (e.g., kilograms) and volume (e.g., liters), the system will not allow this because they represent different physical dimensions.
  Incorrect UoM Configuration: The configuration of units of measurement in the system may not be set up correctly, leading to mismatches.
  Material Master Data Issues: The material master data may have inconsistencies, such as incorrect UoM assignments or missing UoM definitions.
  
  Solution:
  To resolve the BM393 error, you can take the following steps:
  
  
  Check UoM Configuration:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) to review the UoM settings.
  Ensure that the units of measurement you are trying to use are correctly defined and assigned to the appropriate dimensions.
  
  
  
  Review Material Master Data:
  
  Use transaction code MM03 to display the material master record.
  Check the "Basic Data" and "Purchasing" views to ensure that the UoM is correctly assigned and that there are no inconsistencies.
  
  
  
  Correct UoM Assignments:
  
  If you find that the UoM assignments are incorrect, you may need to change them using transaction code MM02 (Change Material).
  Ensure that the UoM you are trying to use is compatible with the dimension of the material.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to units of measurement and material management for additional guidance.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting SAP Notes for any known issues or patches related to this error.
  
  
  
  Related Information:
  
  Units of Measurement (UoM): In SAP, UoMs are defined in the system and can be categorized into different dimensions such as weight, volume, length, etc.
  Material Master: The material master is a central repository of information about materials in SAP, and it includes various views that define how materials are managed and processed.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), MM03 (Display Material), and CUNI (Unit of Measure Conversion) for managing material data and UoM settings.
  
  By following these steps, you should be able to identify and resolve the cause of the BM393 error in SAP.