How To Fix CL_SADL_GW_MDE_MSGX057 - & already defined. Another & cannot be added.

SAP Error Message - Details

• Message type: E = Error

• Message class: CL_SADL_GW_MDE_MSGX - texts for parser

• Message number: 057

• Message text: & already defined. Another & cannot be added.

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CL_SADL_GW_MDE_MSGX057 - & already defined. Another & cannot be added. ?

  The SAP error message CL_SADL_GW_MDE_MSGX057 typically indicates that there is an issue with the definition of a data model in the SAP Gateway or the Service Layer, specifically related to the definition of associations or relationships between entities. The message "already defined. Another & cannot be added." suggests that you are trying to add an association or relationship that has already been defined in the data model.
  Cause:
  
  Duplicate Association: The most common cause of this error is that you are attempting to define an association that already exists in the data model. This can happen if you are trying to create a new association with the same source and target entities as an existing one.
  Model Configuration Issues: There may be issues in the configuration of the data model, such as incorrect definitions or misconfigurations that lead to conflicts.
  Transport Issues: If you are working in a transport environment, there may be inconsistencies between the development and production systems.
  
  Solution:
  
  Check Existing Associations: Review the existing associations in your data model to ensure that you are not trying to create a duplicate. You can do this by navigating to the relevant data model in the SAP Gateway Service Builder (transaction code /IWFND/MAINT_SERVICE).
  Modify Existing Association: If you need to change the existing association, consider modifying it instead of creating a new one. This may involve changing the cardinality or other properties of the existing association.
  Delete Unused Associations: If there are associations that are no longer needed, you can delete them to avoid conflicts.
  Recheck Model Configuration: Ensure that your data model is correctly configured and that there are no other errors present. Validate the model to check for any inconsistencies.
  Transport Consistency: If you suspect that the issue is related to transport, ensure that all relevant objects have been transported correctly and that there are no discrepancies between systems.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for the error message or the class name in the SAP Support Portal.
  Documentation: Review the SAP Gateway documentation for guidelines on defining associations and data models.
  Community Forums: Consider checking SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  If the problem persists after trying the above solutions, you may need to consult with your SAP Basis or development team for further investigation.