How To Fix BM399 - Conversion factors not found

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 399

• Message text: Conversion factors not found

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message BM399 - Conversion factors not found ?

  The SAP error message BM399, which states "Conversion factors not found," typically occurs in the context of material management or inventory management when the system is unable to find the necessary conversion factors for a specific material or unit of measure. This can happen in various scenarios, such as during the creation of purchase orders, production orders, or when performing inventory transactions.
  Causes:
  
  Missing Conversion Factors: The most common cause is that the conversion factors for the material in question have not been defined in the system.
  Incorrect Unit of Measure: The unit of measure being used may not be correctly set up or may not have a corresponding conversion factor.
  Material Master Data Issues: The material master data may be incomplete or incorrectly configured, leading to missing conversion information.
  Configuration Issues: There may be issues in the configuration of the unit of measure settings in the system.
  
  Solutions:
  
  
  Define Conversion Factors:
  
  Go to the material master record (transaction code MM02).
  Check the "Units of Measure" view and ensure that the necessary conversion factors are defined for the relevant units of measure.
  If they are missing, add the required conversion factors.
  
  
  
  Check Unit of Measure Settings:
  
  Ensure that the unit of measure you are trying to use is correctly defined in the system.
  You can check this in the transaction code CUNI (Unit of Measure Maintenance).
  
  
  
  Review Material Master Data:
  
  Verify that the material master data is complete and correctly configured.
  Ensure that all relevant views (such as Basic Data, Purchasing, and Sales) are properly maintained.
  
  
  
  Configuration Review:
  
  If you have access to configuration settings, check the settings related to units of measure in the customizing (transaction code SPRO).
  Ensure that the conversion factors are set up correctly in the relevant configuration areas.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for additional guidance on managing units of measure and conversion factors.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM02: Change Material Master
  CUNI: Unit of Measure Maintenance
  SPRO: Customizing Implementation Guide
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  
  
  User Roles and Authorizations: Ensure that you have the necessary authorizations to make changes to material master data and unit of measure settings.
  
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in material management for further assistance.