How To Fix BM012 - Mark primary unit for ISO code only once

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 012

• Message text: Mark primary unit for ISO code only once

What causes this issue?

You have used the same ISO code for more than one unit of measure and
also flagged several units of measure as primary units for this ISO
code. You can only flag one unit of measure as a primary unit for one
ISO code.

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?

Flag one unit as a primary unit for each ISO code.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BM012 - Mark primary unit for ISO code only once ?

  The SAP error message BM012 ("Mark primary unit for ISO code only once") typically occurs in the context of material master data management, particularly when dealing with units of measure (UoM) and ISO codes. This error indicates that there is an issue with how the primary unit of measure is defined for a specific material in relation to its ISO code.
  Cause:
  The error is usually caused by one of the following reasons:
  
  Duplicate Entries: The primary unit of measure for a material has been marked more than once for the same ISO code in the material master data.
  Incorrect Configuration: There may be a configuration issue in the unit of measure settings or in the material master data setup.
  Data Inconsistency: There could be inconsistencies in the data entered for the material master, particularly in the units of measure section.
  
  Solution:
  To resolve the BM012 error, you can follow these steps:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM02 or MM03).
  Navigate to the "Units of Measure" view.
  Verify that the primary unit of measure is marked correctly and that there are no duplicate entries for the same ISO code.
  
  
  
  Remove Duplicates:
  
  If you find that the primary unit of measure is marked more than once for the same ISO code, remove the duplicate entry.
  Ensure that only one primary unit of measure is assigned to the ISO code.
  
  
  
  Review Configuration:
  
  Check the configuration settings for units of measure in the SAP system (transaction code OMN1).
  Ensure that the settings are correct and that there are no conflicting configurations.
  
  
  
  Data Consistency Check:
  
  Run a data consistency check to identify any other potential issues in the material master data.
  Use transaction codes like MMR1 or MMR2 to analyze and correct any inconsistencies.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for additional guidance on managing units of measure and material master data.
  
  
  
  Contact Support:
  
  If the issue persists after following the above steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material).
  Unit of Measure Configuration: Understanding how units of measure are configured in SAP can help prevent similar issues in the future.
  SAP Notes: Check for any SAP Notes related to this error message for specific patches or updates that may address the issue.
  
  By following these steps, you should be able to resolve the BM012 error and ensure that your material master data is correctly configured.