How To Fix /IWBEP/CM_V4_MED355 - Complex type 'SAP__MESSAGE' must base on structure '/IWBEP/S_V4_MESSAGE'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 355

• Message text: Complex type 'SAP__MESSAGE' must base on structure '/IWBEP/S_V4_MESSAGE'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED355 - Complex type 'SAP__MESSAGE' must base on structure '/IWBEP/S_V4_MESSAGE' ?

  The SAP error message /IWBEP/CM_V4_MED355 indicates that there is an issue with the definition of a complex type in your OData service. Specifically, it states that the complex type SAP__MESSAGE must be based on the structure /IWBEP/S_V4_MESSAGE. This error typically arises when there is a mismatch in the expected structure of the message type used in your OData service.
  Cause:
  
  Incorrect Definition: The complex type SAP__MESSAGE is not correctly defined or does not inherit from the required structure /IWBEP/S_V4_MESSAGE.
  Model Configuration: There may be an issue with the way the OData model is configured, leading to the incorrect mapping of types.
  Version Mismatch: If you are using an older version of the OData service or the underlying components, it may not support the required structure.
  
  Solution:
  
  
  Check the Data Model: Ensure that the complex type SAP__MESSAGE is defined correctly in your OData service. It should inherit from the structure /IWBEP/S_V4_MESSAGE. You can do this by:
  
  Navigating to the Data Model in the SAP Gateway Service Builder (transaction code SEGW).
  Checking the definition of the complex type and ensuring it is based on the correct structure.
  
  
  
  Adjust the Service Implementation: If you have custom implementations, ensure that they are correctly aligned with the expected data model. You may need to adjust your code to ensure that the message structure is correctly utilized.
  
  
  Regenerate the Service: If you have made changes to the data model, regenerate the service to ensure that all changes are reflected. This can be done in the Service Builder by selecting the service and choosing the "Generate" option.
  
  
  Check for Updates: Ensure that your SAP system is up to date with the latest support packages and notes. Sometimes, issues like these are resolved in newer versions.
  
  
  Consult SAP Notes: Look for any relevant SAP Notes that might address this specific error. You can search the SAP Support Portal for notes related to OData services and the specific error message.
  
  
  Testing: After making the necessary changes, test the OData service to ensure that the error is resolved and that the service behaves as expected.
  
  
  Related Information:
  
  OData Services: Understanding how OData services are structured and how complex types and entities are defined is crucial for troubleshooting these types of errors.
  SAP Gateway: Familiarize yourself with the SAP Gateway framework, as it plays a significant role in the creation and management of OData services.
  Transaction Codes: Common transaction codes related to OData services include:
  
  SEGW: Service Builder for OData services.
  /IWBEP/REG_SERVICE: Register OData services.
  /IWBEP/ERROR_LOG: Check error logs for OData services.
  
  
  
  By following these steps, you should be able to resolve the error and ensure that your OData service is functioning correctly.