How To Fix SDDL_PARSER_MSG247 - Key field "&1" already used in ON condition of the composition definition

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 247

• Message text: Key field "&1" already used in ON condition of the composition definition

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG247 - Key field "&1" already used in ON condition of the composition definition ?

  The SAP error message SDDL_PARSER_MSG247 indicates that there is a problem with the definition of a composition in the SAP system, specifically related to the use of key fields in the ON condition of the composition definition. The message states that a key field (represented by "&1") is already being used in the ON condition, which is not allowed.
  Cause:
  The error typically arises when:
  
  A key field is defined multiple times in the ON condition of a composition definition.
  The composition definition is incorrectly set up, leading to ambiguity in how the key fields are being utilized.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Review the Composition Definition:
  
  Go to the relevant transaction or area where the composition definition is maintained (e.g., using transaction codes like SE11 for Data Dictionary or SE80 for Object Navigator).
  Locate the composition definition that is causing the error.
  
  
  
  Check the ON Condition:
  
  Examine the ON condition of the composition definition. Ensure that each key field is only used once.
  If you find that the same key field is being used multiple times, you will need to modify the ON condition to ensure that each key field is unique.
  
  
  
  Modify the Definition:
  
  Remove or adjust the duplicate key field usage in the ON condition.
  Ensure that the logic of the ON condition still meets the requirements of your data model.
  
  
  
  Validate the Changes:
  
  After making the necessary adjustments, validate the composition definition to ensure that it is now error-free.
  Test the changes to confirm that the composition behaves as expected.
  
  
  
  Documentation and Best Practices:
  
  Document the changes made to the composition definition for future reference.
  Follow best practices for defining compositions, such as keeping key fields unique and clearly defining relationships.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for more details on composition definitions and ON conditions.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  Debugging Tools: Utilize debugging tools within SAP to trace the execution and identify where the error is occurring if the issue persists.
  
  By following these steps, you should be able to resolve the SDDL_PARSER_MSG247 error and ensure that your composition definitions are correctly configured.