/IWFND/CM_DESIGNTIME125 - Type of structure component '&1' not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_DESIGNTIME -

• Message number: 125

• Message text: Type of structure component '&1' not supported

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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AnswerBot

• What is the cause and solution for SAP error message /IWFND/CM_DESIGNTIME125 - Type of structure component '&1' not supported ?

  The SAP error message /IWFND/CM_DESIGNTIME125 with the description "Type of structure component '&1' not supported" typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a problem with the definition of a structure component in your OData service, specifically that the type of one of the structure components is not supported by the OData framework.
  Causes:
  
  Unsupported Data Types: The structure component may be using a data type that is not supported by the OData service. For example, certain complex types or custom types may not be recognized.
  Incorrect Mapping: There may be an issue with how the data types are mapped in the service definition.
  Incompatible Structures: If the structure is derived from a database table or view that contains unsupported types, this error can occur.
  Changes in Data Model: If there have been recent changes to the underlying data model (like adding new fields or changing types), the OData service may not be updated accordingly.
  
  Solutions:
  
  Check Data Types: Review the structure definition in the ABAP Dictionary (SE11) and ensure that all data types used are supported by OData. Common supported types include CHAR, NUMC, DATS, TIMS, etc.
  Modify Structure: If you find unsupported types, consider modifying the structure to use supported types. For example, if you have a custom type, you may need to replace it with a standard type.
  Update OData Service: After making changes to the structure, regenerate the OData service. You can do this by going to the Service Builder (transaction SEGW) and reactivating the service.
  Check Service Metadata: Use the OData service metadata URL (e.g., /sap/opu/odata/sap/<service_name>/$metadata) to inspect the service definition and ensure that all components are correctly defined.
  Debugging: If the issue persists, consider debugging the OData service to identify where the unsupported type is being referenced.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on supported data types in OData services.
  Documentation: Refer to the SAP Gateway documentation for information on supported data types and best practices for defining OData services.
  Community Forums: Engage with the SAP Community or forums like SAP Community Network (SCN) for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.