How To Fix LOP059 - Customizing: Class &1 does not exist or does not implement interface &2

SAP Error Message - Details

• Message type: E = Error

• Message class: LOP - Logistical contract options

• Message number: 059

• 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message LOP059 - Customizing: Class &1 does not exist or does not implement interface &2 ?

  The SAP error message LOP059 indicates that there is an issue with a class in the SAP system that is either not defined or does not implement the required interface. This error typically occurs in the context of SAP Logistics Execution (LE) or Warehouse Management (WM) when the system is trying to execute a function that relies on a specific class.
  Cause:
  
  Class Not Defined: The class specified in the error message (&1) does not exist in the system. This could be due to a missing transport or an incomplete installation.
  Class Does Not Implement Interface: The class exists but does not implement the required interface (&2). This could happen if the class was modified or if the interface was changed and the class was not updated accordingly.
  Transport Issues: If the class was recently transported from another system, there may have been issues during the transport process.
  Development Errors: Custom developments may have errors where the class was not properly defined or implemented.
  
  Solution:
  
  
  Check Class Existence:
  
  Use transaction code SE80 (Object Navigator) or SE24 (Class Builder) to check if the class exists in the system.
  If the class does not exist, you may need to create it or transport it from another system.
  
  
  
  Check Interface Implementation:
  
  If the class exists, check if it implements the required interface. You can do this in the Class Builder (SE24) by viewing the class's interface section.
  If it does not implement the interface, you will need to modify the class to implement the required methods of the interface.
  
  
  
  Review Transport Requests:
  
  If the class was recently transported, check the transport logs for any errors or issues during the transport process.
  Ensure that all necessary objects were included in the transport request.
  
  
  
  Debugging:
  
  If you have access to the development environment, you can debug the program or function module that is triggering the error to get more context on why the class is being called.
  
  
  
  Consult Documentation:
  
  Review any related documentation or notes from SAP that may provide additional context or solutions for this specific error.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP support for assistance, especially if this is a production issue.
  
  
  
  Related Information:
  
  Transaction Codes: SE80 (Object Navigator), SE24 (Class Builder), SE37 (Function Module), SE38 (ABAP Program).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on similar issues.
  Custom Development: If this is related to custom development, ensure that the development team is aware of the issue and can provide support in resolving it.
  
  By following these steps, you should be able to identify the root cause of the LOP059 error and implement a solution.