How To Fix LK001 - No function module defined for message type &

SAP Error Message - Details

• Message type: E = Error

• Message class: LK - WM -> SUB connection messages

• Message number: 001

• Message text: No function module defined for message type &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LK001 - No function module defined for message type & ?

  The SAP error message LK001: No function module defined for message type & typically occurs when the system is unable to find a function module associated with a specific message type in the context of the Logistics Execution (LE) module, particularly in relation to handling messages for deliveries, shipments, or other logistics processes.
  Cause:
  
  Missing Function Module: The primary cause of this error is that there is no function module defined for the specified message type in the system. This can happen if the message type is incorrectly configured or if the necessary function module has not been created or activated.
  Configuration Issues: The message type may not be properly configured in the relevant customizing settings, leading to the system being unable to link the message type to a function module.
  Transport Issues: If the system has recently undergone a transport of changes, the function module may not have been included in the transport request, leading to its absence in the target system.
  
  Solution:
  
  
  Check Message Type Configuration:
  
  Go to the transaction code NACE (Message Control).
  Select the appropriate application area (e.g., "V1" for Sales, "LE" for Logistics Execution).
  Check the configuration for the specific message type that is causing the error. Ensure that a function module is assigned to it.
  
  
  
  Define or Assign Function Module:
  
  If no function module is assigned, you may need to create a new function module or assign an existing one that is appropriate for the message type.
  Use transaction code SE37 to create or modify function modules.
  
  
  
  Check for Missing Transport:
  
  If the error occurred after a transport, verify that the function module was included in the transport request and that it has been successfully imported into the target system.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can set breakpoints in the relevant areas to trace where the error is occurring and gather more information about the context in which the error is raised.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the specific message type and its function module requirements. SAP Notes may provide additional insights or solutions.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot resolve it, consider reaching out to SAP Support for assistance, especially if it involves standard SAP functionality.
  
  
  
  Related Information:
  
  Message Types: In SAP, message types are used to control the output of various documents and processes. Each message type can be linked to specific function modules that handle the processing of those messages.
  Function Modules: These are reusable pieces of code in SAP that can be called from various programs and processes. They often contain the logic for processing specific tasks, such as sending messages or performing calculations.
  Custom Development: If your organization has custom developments, ensure that any custom function modules are properly documented and maintained to avoid similar issues in the future.
  
  By following these steps, you should be able to identify and resolve the LK001 error in your SAP system.