How To Fix MPN01051 - Manufacturer part number conversion exit is not active

SAP Error Message - Details

• Message type: E = Error

• Message class: MPN01 - MPN Message: Material Master / customizing

• Message number: 051

• Message text: Manufacturer part number conversion exit is not active

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MPN01051 - Manufacturer part number conversion exit is not active ?

  The SAP error message MPN01051, which states "Manufacturer part number conversion exit is not active," typically occurs when the system is unable to convert a manufacturer part number (MPN) due to the absence of an active conversion exit for that specific part number format. This can happen in various scenarios, such as during the creation or modification of material master records or when processing purchase orders.
  Cause:
  
  Inactive Conversion Exit: The conversion exit for the manufacturer part number is not defined or is inactive in the system.
  Missing Configuration: The necessary configuration for handling manufacturer part numbers may not be set up correctly in the system.
  Incorrect Data Format: The format of the manufacturer part number being entered does not match the expected format defined in the conversion exit.
  
  Solution:
  
  
  Check Conversion Exits:
  
  Go to transaction code SE11 (Data Dictionary) and check the conversion exit for the manufacturer part number. The conversion exit is usually defined in the form of a function module.
  Ensure that the conversion exit is active. If it is not, you may need to activate it or create a new one if necessary.
  
  
  
  Configuration Settings:
  
  Navigate to the configuration settings for manufacturer part numbers. This can typically be found in the Material Management (MM) module under the relevant settings for material master data.
  Ensure that the settings for manufacturer part numbers are correctly configured and that the conversion exit is linked to the appropriate field.
  
  
  
  Data Format Validation:
  
  Verify that the manufacturer part number being entered adheres to the expected format. If the format is incorrect, adjust the input accordingly.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources related to manufacturer part numbers and conversion exits for additional guidance.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. They may provide insights specific to your system configuration.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) to test the changes.
  Function Modules: Look into function modules related to manufacturer part number conversion, such as CONVERSION_EXIT_MPN_INPUT and CONVERSION_EXIT_MPN_OUTPUT, to understand how they work.
  SAP Notes: Search for SAP Notes related to MPN and conversion exits, as they may contain specific fixes or updates relevant to your version of SAP.
  
  By following these steps, you should be able to resolve the MPN01051 error and ensure that manufacturer part numbers are processed correctly in your SAP system.