How To Fix LOP074 - 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: 074

• Message text: 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message LOP074 - Class &1 does not exist or does not implement interface &2 ?

  The SAP error message LOP074 indicates that there is an issue with a class or interface in the ABAP programming environment. Specifically, the message states that the specified class (&1) does not exist or does not implement the specified interface (&2). This can occur in various scenarios, such as when trying to instantiate a class or when there is a mismatch in the expected class/interface implementation.
  Causes:
  
  Class Does Not Exist: The class name provided in the error message may be misspelled or may not exist in the system.
  Interface Not Implemented: The class exists, but it does not implement the specified interface. This could be due to a missing implementation or an incorrect class definition.
  Namespace Issues: The class might be in a different namespace, and the system cannot find it.
  Transport Issues: If the class was recently transported from another system, it may not have been transported correctly or may not exist in the target system.
  Authorization Issues: The user may not have the necessary authorizations to access the class or interface.
  
  Solutions:
  
  Check Class Name: Verify that the class name is spelled correctly and exists in the system. You can do this by using transaction SE80 (Object Navigator) or SE24 (Class Builder).
  Check Interface Implementation: Ensure that the class implements the specified interface. You can check this in the class definition in SE24.
  Namespace Verification: If the class is in a different namespace, ensure that you are referencing it correctly, including the namespace prefix.
  Transport Check: If the class was recently transported, check the transport logs to ensure that it was transported successfully and is available in the target system.
  Authorization Check: Ensure that the user has the necessary authorizations to access the class and interface. You can check this with transaction SU53 or by consulting with your security team.
  Recompile the Class: Sometimes recompiling the class can resolve issues. You can do this in SE24 by activating the class.
  
  Related Information:
  
  Transaction Codes:
  
  SE80: Object Navigator
  SE24: Class Builder
  SE11: Data Dictionary (to check if the interface exists)
  SE37: Function Module (if the class is being called from a function module)
  
  
  Debugging: If you are unsure where the error is occurring, you can use the debugger to trace the execution and find out where the class/interface is being called.
  Documentation: Review the SAP documentation for the specific class and interface to understand their expected behavior and requirements.
  
  By following these steps, you should be able to identify and resolve the issue related to the LOP074 error message in SAP.