How To Fix /IWBEP/CM_MGW_GENER027 - Type '&1' not data structure

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_GENER -

• Message number: 027

• Message text: Type '&1' not data structure

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_GENER027 - Type '&1' not data structure ?

  The SAP error message /IWBEP/CM_MGW_GENER027 Type '&1' not data structure typically occurs in the context of SAP Gateway and OData services. This error indicates that the system is expecting a data structure of a certain type, but it cannot find or recognize it. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Missing Data Structure: The specified type (denoted by &1 in the error message) is not defined in the system. This could be due to a missing or incorrectly defined data structure in the ABAP Dictionary.
  Incorrect Mapping: The OData service may be incorrectly mapped to a data structure that does not exist or is not properly defined.
  Transport Issues: If the data structure was recently transported from another system, it may not have been transported correctly or may be missing in the target system.
  Versioning Issues: There may be version mismatches between the OData service and the underlying data structures.
  
  Solutions:
  
  
  Check Data Structure Definition:
  
  Go to the ABAP Dictionary (transaction SE11) and check if the data structure exists. If it does not exist, you may need to create it or correct the reference in your OData service.
  
  
  
  Review OData Service:
  
  Use transaction /IWFND/MAINT_SERVICE to check the OData service and ensure that it is correctly configured and activated.
  Check the service implementation in transaction SEGW to ensure that the data types are correctly defined and mapped.
  
  
  
  Re-generate the Service:
  
  If you have made changes to the data structure or the service, you may need to regenerate the service. In transaction SEGW, right-click on the project and select "Generate Runtime Objects".
  
  
  
  Check Transport Requests:
  
  If the issue arose after a transport, verify that all necessary objects (including data structures) were included in the transport request and that they were successfully imported into the target system.
  
  
  
  Debugging:
  
  If the issue persists, consider debugging the OData service to trace where the error occurs. This can provide insights into what is being called and why the type is not recognized.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. You can search for the error message or related keywords in the SAP Support Portal.
  Documentation: Review the SAP Gateway and OData documentation for best practices on defining and using data structures.
  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 root cause of the error and implement a solution.