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

WB2B859 - Overview

• 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