How To Fix MM337 - Cannot save changes; inventory-managed MPN is not active

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 337

• Message text: Cannot save changes; inventory-managed MPN is not active

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MM337 - Cannot save changes; inventory-managed MPN is not active ?

  The SAP error message MM337, "Cannot save changes; inventory-managed MPN is not active," typically occurs when you are trying to make changes to a material that is managed under a Manufacturer Part Number (MPN) but the MPN is not active in the system. This can happen in the context of materials management, particularly when dealing with inventory-managed materials.
  Cause:
  
  Inactive MPN: The MPN associated with the material is not active in the system. This means that the system does not recognize the MPN as valid for inventory management.
  Configuration Issues: There may be configuration settings in the system that prevent the MPN from being used or recognized.
  Data Integrity Issues: There could be inconsistencies in the data related to the MPN or the material master record.
  
  Solution:
  
  
  Activate the MPN:
  
  Go to the MPN management transaction (usually in the Material Master or MPN area).
  Check the status of the MPN and ensure it is set to active.
  If it is inactive, activate it.
  
  
  
  Check Material Master Data:
  
  Navigate to the material master record (transaction code MM02).
  Ensure that the MPN is correctly assigned to the material and that all relevant fields are filled out correctly.
  
  
  
  Review Configuration Settings:
  
  Check the configuration settings related to MPNs in the SAP system. This may involve consulting with your SAP Basis or configuration team to ensure that the MPN functionality is set up correctly.
  
  
  
  Data Consistency Check:
  
  Run any necessary data consistency checks to ensure that there are no discrepancies in the material master data or MPN data.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on MPN management and troubleshooting.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  MPN Management: Manufacturer Part Numbers are used to identify products from specific manufacturers. Proper management of MPNs is crucial for inventory accuracy and procurement processes.
  Material Master: The material master record contains all the information a company needs to manage a material, including purchasing, inventory management, and sales data.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) for managing material master data.
  
  By following these steps, you should be able to resolve the MM337 error and successfully save your changes.