How To Fix MM349 - Alternative unit of measure cannot be deleted; it is used in BOMs

SAP Error Message - Details

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 349

• Message text: Alternative unit of measure cannot be deleted; it is used in BOMs

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MM349 - Alternative unit of measure cannot be deleted; it is used in BOMs ?

  The SAP error message MM349 indicates that you are trying to delete an alternative unit of measure (UoM) that is currently being used in one or more Bill of Materials (BOMs). This restriction is in place to maintain data integrity, as the alternative UoM is linked to existing BOMs and removing it could lead to inconsistencies.
  Cause:
  The primary cause of this error is that the alternative unit of measure you are attempting to delete is actively referenced in BOMs. SAP does not allow the deletion of UoMs that are in use to prevent potential issues with material planning and inventory management.
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify Usage: Determine where the alternative unit of measure is being used. You can do this by checking the BOMs that reference the material in question. You can use transaction codes like CS03 (Display BOM) to view the BOMs and see if the alternative UoM is listed.
  
  
  Remove References: If you find that the alternative UoM is indeed being used in BOMs, you will need to either:
  
  Modify the BOMs to remove the reference to the alternative UoM.
  Change the BOM to use a different UoM if applicable.
  
  
  
  Delete Alternative UoM: Once you have removed all references to the alternative UoM from the BOMs, you can then proceed to delete the alternative UoM using transaction code MM02 (Change Material) and navigating to the appropriate view.
  
  
  Check for Other Dependencies: Ensure that there are no other dependencies or references to the alternative UoM in other areas of the system, such as purchasing documents, production orders, or inventory records.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM02: Change Material Master
  CS03: Display BOM
  CS02: Change BOM
  CS01: Create BOM
  
  
  
  Documentation: Refer to SAP Help documentation for more details on managing material master data and BOMs.
  
  
  Best Practices: Regularly review and clean up unused alternative units of measure to avoid clutter and potential errors in the future. Ensure that any changes to UoMs are communicated to relevant stakeholders to maintain consistency across the system.
  
  
  By following these steps, you should be able to resolve the MM349 error and successfully manage your alternative units of measure in SAP.