How To Fix ML_CAI_MESSAGE103 - RFC Error : Invalid destination &1 &2 &3 &4

SAP Error Message - Details

• Message type: E = Error

• Message class: ML_CAI_MESSAGE -

• Message number: 103

• Message text: RFC Error : Invalid destination &1 &2 &3 &4

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 ML_CAI_MESSAGE103 - RFC Error : Invalid destination &1 &2 &3 &4 ?

  The SAP error message "ML_CAI_MESSAGE103 RFC Error: Invalid destination &1 &2 &3 &4" typically indicates that there is an issue with the Remote Function Call (RFC) destination that is being used in your SAP system. This error can occur for various reasons, and understanding the cause and potential solutions can help you resolve it.
  Causes:
  
  Incorrect RFC Destination Configuration: The RFC destination specified in the error message may not be correctly configured in the SAP system.
  Network Issues: There may be network connectivity issues between the SAP system and the target system specified in the RFC destination.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to access the target system.
  Target System Down: The target system that the RFC destination points to may be down or not reachable.
  Incorrect Parameters: The parameters used in the RFC call may be incorrect or not matching the expected format.
  
  Solutions:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the RFC destination mentioned in the error message.
  Verify that the configuration settings (such as the target host, system number, client, and logon credentials) are correct.
  
  
  
  Test the RFC Connection:
  
  In transaction SM59, select the RFC destination and use the "Connection Test" option to check if the connection can be established successfully.
  If the test fails, review the error message for more details.
  
  
  
  Check Network Connectivity:
  
  Ensure that there are no network issues preventing communication between the SAP system and the target system.
  You can use tools like ping or telnet to check connectivity to the target host.
  
  
  
  Review User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system.
  Check the user roles and profiles in both the source and target systems.
  
  
  
  Check Target System Status:
  
  Verify that the target system is up and running. If it is down, you may need to wait until it is back online.
  
  
  
  Review Parameters:
  
  If the RFC call includes parameters, ensure that they are correctly formatted and match the expected input for the function module being called.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Logs: Review the application logs (transaction SLG1) for more detailed error messages that may provide additional context.
  Documentation: Refer to SAP documentation for more information on RFC destinations and troubleshooting RFC errors.
  
  By following these steps, you should be able to identify and resolve the issue causing the "ML_CAI_MESSAGE103 RFC Error: Invalid destination" message. If the problem persists, consider reaching out to your SAP Basis team or SAP support for further assistance.