How To Fix SDDL_PARSER_MSG204 - Association "&1" On condition is not compatible for "child to parent"

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 204

• Message text: Association "&1" On condition is not compatible for "child to parent"

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG204 - Association "&1" On condition is not compatible for "child to parent" ?

  The SAP error message SDDL_PARSER_MSG204 indicates that there is an issue with the association definition in your SAP system, specifically regarding the compatibility of the "On condition" for a child-to-parent relationship. This error typically arises in the context of SAP's data modeling or service definition, particularly when working with the SAP Gateway or OData services.
  
  Cause:
  The error occurs when the association defined between two entities (usually in an OData service) has an "On condition" that is not compatible with the expected relationship. In a child-to-parent relationship, the "On condition" should correctly reference the key fields of the parent entity. If the condition does not align with the expected structure or data types, this error will be triggered.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check the Association Definition:
  
  Go to the data model or service definition where the association is defined.
  Verify that the association between the child and parent entities is correctly