How To Fix /IWBEP/CM_CP159 - Class '&1' does not implement interface '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 159

• Message text: Class '&1' does not implement interface '&2'

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_CP159 - Class '&1' does not implement interface '&2' ?

  The SAP error message /IWBEP/CM_CP159 Class '&1' does not implement interface '&2' typically occurs in the context of SAP Gateway and OData services. This error indicates that a specific class (denoted by &1) is expected to implement a certain interface (denoted by &2), but it does not. This can happen for various reasons, such as missing implementations, incorrect class definitions, or issues with the service registration.
  Cause
  
  Missing Implementation: The class that is supposed to implement the specified interface does not have the required methods defined.
  Incorrect Class Definition: The class may not be correctly defined or may not be activated in the system.
  Service Registration Issues: The OData service may not be properly registered or activated in the SAP Gateway.
  Transport Issues: If the class was transported from another system, it may not have been transported correctly, leading to missing implementations.
  
  Solution
  
  
  Check Class Implementation:
  
  Go to the ABAP Workbench (SE80) and check the class &1.
  Ensure that it implements all the methods defined in the interface &2.
  If methods are missing, implement them as required.
  
  
  
  Activate the Class:
  
  Ensure that the class is activated. You can do this in the ABAP Workbench by selecting the class and choosing the "Activate" option.
  
  
  
  Check Service Registration:
  
  Use transaction /IWFND/MAINT_SERVICE to check if the OData service is properly registered and activated.
  If the service is not active, activate it.
  
  
  
  Check Transport Requests:
  
  If the class was transported, ensure that all related objects (like interfaces and services) were transported correctly.
  Check for any transport errors or missing objects.
  
  
  
  Debugging:
  
  If the issue persists, you can debug the OData service to see where the error is occurring. This can provide more context on why the class is not recognized as implementing the interface.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation for the specific interface and class to ensure that you are following the correct implementation guidelines.
  
  
  
  Related Information
  
  Transaction Codes:
  
  SE80: Object Navigator
  SE24: Class Builder
  /IWFND/MAINT_SERVICE: Service Maintenance
  
  
  SAP Notes: Check for any relevant SAP Notes that might address known issues with the specific class or interface.
  Community Forums: Consider searching or posting on SAP Community forums for additional insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the issue related to the error message /IWBEP/CM_CP159 Class '&1' does not implement interface '&2'.