How To Fix M3337 - Conversion factors for alt. units already exist; make sure you check them

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 337

• Message text: Conversion factors for alt. units already exist; make sure you check them

What causes this issue?

You have changed the base unit of measure, although alternative units
of measure and their conversion factors were already specified for the
previous base unit.

How to fix this error?

Check the conversion factors using F5.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3337 - Conversion factors for alt. units already exist; make sure you check them ?

  The SAP error message M3337 indicates that there are already existing conversion factors for alternative units of measure in the system. This typically occurs when you are trying to create or modify a material master record, specifically in the context of defining alternative units of measure and their conversion factors.
  Cause:
  The error arises when:
  
  You attempt to create a new conversion factor for an alternative unit of measure that already has existing conversion factors defined.
  There may be inconsistencies or conflicts in the data related to the alternative units of measure.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Existing Conversion Factors:
  
  Navigate to the material master record (transaction code MM03 for display).
  Go to the "Units of Measure" view.
  Review the existing alternative units of measure and their conversion factors to see if the one you are trying to add already exists.
  
  
  
  Modify or Delete Existing Conversion Factors:
  
  If you find that the conversion factor you want to add already exists, you can either modify it or delete it if it is no longer needed.
  Use transaction code MM02 to change the material master and update the conversion factors as necessary.
  
  
  
  Create New Alternative Unit of Measure:
  
  If you need to create a new alternative unit of measure, ensure that it does not conflict with existing ones. You may need to choose a different unit or adjust the existing ones.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to material master data and units of measure for additional guidance.
  
  
  
  Check for Customizations:
  
  If your organization has custom developments or enhancements related to material management, check with your SAP support team to see if there are any specific rules or validations that might be causing this error.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  MM01: Create Material
  MM02: Change Material
  MM03: Display Material
  MM04: Display Material Changes
  
  
  Unit of Measure Configuration:
  
  Ensure that the units of measure are correctly configured in the system. This can be done through the customizing transaction SPRO under Logistics > Material Management > Basic Settings > Units of Measure.
  
  
  SAP Notes:
  
  Check for any relevant SAP Notes that might address specific issues or bugs related to this error message.
  
  
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it. If the issue persists, consider reaching out to your SAP support team for further assistance.