How To Fix WTADDI300 - It is not possible to convert ISO unit of measure & to a SAP code

WTADDI300 - Overview

• Message type: E = Error

• Message class: WTADDI - Additionals: Messages

• Message number: 300

• Message text: It is not possible to convert ISO unit of measure & to a SAP code

Self-Explanatory Message

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WTADDI300 - Details

• SAP Error Message:
  WTADDI300 – "It is not possible to convert ISO unit of measure & to a SAP code"
  
  
  Cause:
  This error occurs when SAP encounters an ISO unit of measure (UoM) in a document or data input that it cannot map or convert to an internal SAP unit of measure code. Essentially, the system receives a UoM in ISO standard format (e.g., "KG", "M", "L") but does not find a corresponding SAP UoM in its conversion table or master data.
  This typically happens in scenarios such as:
  
  Data exchange interfaces (IDocs, BAPIs, EDI) where external systems send ISO UoM codes.
  Integration with external systems or middleware that use ISO UoM codes.
  Master data or transactional data where the UoM is not maintained or mapped properly.
  Missing or incomplete configuration in SAP for unit of measure conversions.
  
  
  
  Solution:
  
  
  Check and Maintain Unit of Measure Conversion:
  
  Go to transaction CUNI (Units of Measure) or CUNI1 (Units of Measure: Display).
  Verify if the