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

/SCWM/UI_RF126 - Overview

• 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

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

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/SCWM/UI_RF126 - Details

• 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