Message type: E = Error
Message class: /IWFND/CM_DESIGNTIME -
Message number: 164
Message text: Structure(s) &1 already exist(s)
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The SAP error message /IWFND/CM_DESIGNTIME164 Structure(s) &1 already exist(s) typically occurs in the context of SAP Gateway and OData service development. This error indicates that there is an attempt to create a structure that already exists in the system, which can happen during the activation or registration of an OData service or when trying to redefine a structure in the Data Model.
Cause: Duplicate Structure Definition: The structure you are trying to create or activate already exists in the system. This can happen if the same structure is defined in multiple places or if there was a previous attempt to create it that was not properly cleaned up. Transport Issues: If you are working in a transport environment, the structure might have been transported from another system, leading to conflicts. Development Objects: If you are working with multiple development objects or projects, there might be overlapping definitions.
Solution: Check Existing Structures: Use transaction code SE11 (Data
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