How To Fix /SCWM/UI_RF126 - SAP unit for ISO code &1 does not exist or is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/UI_RF -

• Message number: 126

• Message text: SAP unit for ISO code &1 does not exist or is not unique

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/UI_RF126 - SAP unit for ISO code &1 does not exist or is not unique ?

  The SAP error message /SCWM/UI_RF126 indicates that there is an issue with the ISO code for a unit of measure (UoM) in the SAP Extended Warehouse Management (EWM) system. Specifically, it means that the system cannot find a unique entry for the specified ISO code, which is necessary for processing the relevant transaction.
  Cause:
  
  Missing ISO Code: The ISO code for the unit of measure you are trying to use does not exist in the system.
  Non-Unique ISO Code: There may be multiple entries for the same ISO code, leading to ambiguity.
  Configuration Issues: The unit of measure may not be properly configured in the system, or it may not be linked to the relevant material or product.
  Data Inconsistencies: There could be inconsistencies in the master data, such as the material master or UoM settings.
  
  Solution:
  
  
  Check ISO Code Configuration:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) or OMN1 (Define Units of Measure) to check if the ISO code exists.
  Ensure that the ISO code is correctly defined and is unique.
  
  
  
  Verify Material Master Data:
  
  Use transaction code MM03 to display the material master and check the units of measure assigned to the material.
  Ensure that the relevant UoM is linked to the material and that the ISO code is correctly assigned.
  
  
  
  Check for Duplicates:
  
  If the ISO code exists, check for any duplicate entries in the configuration. You can use transaction SE16N to query the relevant tables (e.g., T006 for units of measure) to identify duplicates.
  
  
  
  Maintain UoM Settings:
  
  If necessary, maintain the unit of measure settings in the system to ensure that the ISO code is correctly defined and linked to the appropriate materials.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for additional guidance on managing units of measure and ISO codes.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  CUNI: Unit of Measure Conversion
  OMN1: Define Units of Measure
  MM03: Display Material Master
  SE16N: Data Browser for table queries
  
  
  
  Tables:
  
  T006: Units of Measure
  T006A: Units of Measure (Language-dependent)
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional solutions related to this error message.
  
  
  By following these steps, you should be able to resolve the error message /SCWM/UI_RF126 and ensure that the ISO code for the unit of measure is correctly configured in your SAP EWM system.