How To Fix SPXN193 - Signature is incompatible (different RFC function name)

SAP Error Message - Details

• Message type: E = Error

• Message class: SPXN - Proxy Generation

• Message number: 193

• Message text: Signature is incompatible (different RFC function name)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SPXN193 - Signature is incompatible (different RFC function name) ?

  The SAP error message SPXN193, which states "Signature is incompatible (different RFC function name)," typically occurs in the context of Remote Function Calls (RFC) when there is a mismatch between the function module signature in the calling system and the one in the target system. This can happen for several reasons, including changes in the function module, differences in the versions of the systems, or incorrect configuration.
  Causes:
  
  Function Module Changes: The function module in the target system may have been modified (e.g., parameters added, removed, or changed) after the calling system was last updated.
  Version Mismatch: The calling and target systems may be running different versions of the same function module, leading to signature incompatibility.
  Incorrect RFC Destination: The RFC destination may be pointing to the wrong system or function module.
  Transport Issues: If the function module was transported from one system to another, it may not have been properly activated or may have been transported incorrectly.
  
  Solutions:
  
  
  Check Function Module Signature:
  
  Verify the signature of the function module in both the calling and target systems. Ensure that they match in terms of parameters and their types.
  Use transaction SE37 to view the function module and compare the signatures.
  
  
  
  Update RFC Destination:
  
  Ensure that the RFC destination is correctly configured. You can check this in transaction SM59.
  Test the connection to ensure it is pointing to the correct system and function module.
  
  
  
  Transport and Activation:
  
  If the function module was recently transported, ensure that it has been activated in the target system.
  Check the transport logs for any errors or warnings that might indicate issues during the transport process.
  
  
  
  System Synchronization:
  
  If there are multiple systems (e.g., development, quality assurance, production), ensure that they are synchronized in terms of function module versions.
  If necessary, transport the latest version of the function module to the target system.
  
  
  
  Debugging:
  
  If the issue persists, consider debugging the RFC call to identify where the mismatch occurs. This can provide insights into the parameters being passed and the expected signature.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to RFC and function module issues. SAP frequently updates its knowledge base with solutions to common problems.
  Documentation: Review the official SAP documentation for RFC and function modules to understand the expected behavior and configurations.
  Community Forums: Engage with SAP community forums or support channels for additional insights and shared experiences from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the SPXN193 error effectively.