How To Fix /IWBEP/CM_CP120 - Complex type '&1': Property '&2' generation failed

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 120

• Message text: Complex type '&1': Property '&2' generation failed

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 /IWBEP/CM_CP120 - Complex type '&1': Property '&2' generation failed ?

  The SAP error message /IWBEP/CM_CP120 indicates that there is an issue with the generation of a complex type in the SAP Gateway framework, specifically related to the properties of that complex type. This error typically arises during the generation of the OData service or when trying to activate the service.
  Cause:
  
  Invalid Data Type: The property defined in the complex type may have an invalid or unsupported data type.
  Missing Annotations: Required annotations for the property may be missing, which can lead to issues during the generation process.
  Inconsistent Metadata: There may be inconsistencies in the metadata definitions, such as mismatched names or types.
  Model Issues: The underlying data model may have issues, such as missing associations or incorrect relationships.
  Technical Settings: The technical settings of the service or the data model may not be configured correctly.
  
  Solution:
  
  Check Data Types: Review the data types of the properties in the complex type and ensure they are valid and supported by OData.
  Review Annotations: Ensure that all required annotations for the properties are present and correctly defined.
  Validate Metadata: Check the metadata definitions for any inconsistencies or errors. You can use transaction /IWFND/MAINT_SERVICE to check the service and its metadata.
  Rebuild the Model: If there are significant issues, consider rebuilding the data model or regenerating the service.
  Check Technical Settings: Verify the technical settings of the OData service to ensure they are correctly configured.
  Debugging: If the issue persists, you may need to debug the generation process to identify the exact cause of the failure.
  
  Related Information:
  
  Transaction Codes: Use transaction /IWFND/MAINT_SERVICE to manage OData services and check their status.
  SAP Notes: Search for relevant SAP Notes that may address specific issues related to this error message.
  Documentation: Refer to the SAP Gateway documentation for guidelines on defining complex types and properties.
  Community Forums: Check SAP Community forums for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the issue causing the /IWBEP/CM_CP120 error message.