How To Fix WB2B859 - Customizing: Class &1 does not exist or does not implement interface &2

SAP Error Message - Details

• Message type: E = Error

• Message class: WB2B - Trading Contract

• Message number: 859

• Message text: Customizing: Class &1 does not exist or 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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WB2B859 - Customizing: Class &1 does not exist or does not implement interface &2 ?

  The SAP error message WB2B859 indicates that there is an issue with a custom class in the SAP system. Specifically, it states that the class specified does not exist or does not implement the required interface. This error typically occurs in the context of SAP Business Workflow or when working with Business Object Processing.
  Cause:
  
  Class Does Not Exist: The specified class name in the error message is either misspelled or has not been created in the system.
  Class Not Implementing Interface: The class exists but does not implement the required interface that is expected by the calling program or workflow.
  Transport Issues: If the class was recently transported from another system, it may not have been transported correctly, or dependencies may be missing.
  Authorization Issues: The user may not have the necessary authorizations to access the class or interface.
  
  Solution:
  
  
  Check Class Existence:
  
  Use transaction code SE24 (Class Builder) to check if the class exists in the system.
  If it does not exist, you may need to create it or transport it from another system.
  
  
  
  Verify Interface Implementation:
  
  If the class exists, check if it implements the required interface. You can do this in SE24 by viewing the class's details and checking the "Interfaces" tab.
  If it does not implement the required interface, you will need to modify the class to implement it.
  
  
  
  Check Transport Requests:
  
  If the class was recently transported, ensure that the transport request was completed successfully and that all dependencies were included.
  You can check the transport logs for any errors.
  
  
  
  Authorization Check:
  
  Ensure that the user has the necessary authorizations to access the class and interface. This can be checked in transaction SU53 or by consulting with your security team.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can set breakpoints in the code that is calling the class to see if there are any additional issues or context that can help identify the problem.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SE24: Class Builder
  SE80: Object Navigator
  SE37: Function Module
  SE11: Data Dictionary
  SU53: Authorization Check
  
  
  
  Documentation: Refer to SAP Help documentation for more details on class and interface implementation.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  By following these steps, you should be able to identify and resolve the issue related to the WB2B859 error message in your SAP system.