How To Fix SDDL_PARSER_MSG320 - To-parent association can be exposed once only

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 320

• Message text: To-parent association can be exposed once only

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG320 - To-parent association can be exposed once only ?

  The SAP error message SDDL_PARSER_MSG320 with the description "To-parent association can be exposed once only" typically occurs in the context of SAP's Service Data Objects (SDO) or when working with the Service Definition Language (SDL). This error indicates that there is an issue with the way associations (relationships) between entities are defined in your data model.
  Cause:
  The error arises when you attempt to define a "to-parent" association more than once for a particular entity. In SDO or SDL, a "to-parent" association is a relationship where a child entity references a single parent entity. The system expects each child entity to have a unique association to its parent, and defining it multiple times violates this rule.
  Solution:
  To resolve this error, you should:
  
  
  Review the Data Model: Check the definitions of your entities and their associations. Look for any duplicate "to-parent" associations that may have been defined for the same child entity.
  
  
  Remove Duplicates: If you find multiple definitions of the same "to-parent" association, remove the duplicates so that each child entity has only one association to its parent.
  
  
  Validate the Model: After making changes, validate your data model to ensure that there are no other issues and that the associations are correctly defined.
  
  
  Test the Changes: Once you have made the necessary adjustments, test the application or service to ensure that the error no longer occurs and that the associations work as intended.
  
  
  Related Information:
  
  Documentation: Refer to the official SAP documentation for Service Data Objects or Service Definition Language for more details on defining associations and the rules governing them.
  SAP Community: You can also check the SAP Community forums for discussions related to this error, as other users may have encountered similar issues and shared their solutions.
  Debugging Tools: Utilize SAP's debugging tools to trace the execution and identify where the error is being triggered, which can provide additional context for resolving the issue.
  
  By following these steps, you should be able to resolve the SDDL_PARSER_MSG320 error and ensure that your data model is correctly configured.