How To Fix RS_EXCEPTION104 - RFC communication error: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_EXCEPTION - Exception Messages

• Message number: 104

• Message text: RFC communication error: &1

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RS_EXCEPTION104 - RFC communication error: &1 ?

  The SAP error message "RS_EXCEPTION104 RFC communication error: &1" typically indicates that there is a problem with Remote Function Call (RFC) communication between SAP systems or between an SAP system and an external system. This error can arise due to various reasons, and understanding the cause is crucial for troubleshooting.
  Possible Causes:
  
  Network Issues: There may be network connectivity problems between the systems involved. This could be due to firewalls, routing issues, or network outages.
  Configuration Errors: Incorrect RFC destination configuration in the SAP system can lead to communication errors. This includes incorrect settings in the RFC destination (transaction SM59).
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to perform the requested operation.
  System Availability: The target system may be down or not reachable due to maintenance or other issues.
  Timeouts: Long-running processes may exceed the timeout settings for RFC calls, leading to communication errors.
  Version Mismatch: Incompatibility between different SAP versions or components can also lead to RFC communication issues.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify network connectivity between the systems.
  Ensure that firewalls are configured to allow traffic on the required ports.
  
  
  
  Verify RFC Destination Configuration:
  
  Go to transaction SM59 and check the configuration of the RFC destination.
  Test the connection using the "Connection Test" option to see if it is successful.
  
  
  
  Check User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations.
  You can check user roles and profiles in transaction SU01.
  
  
  
  Check System Availability:
  
  Verify that the target system is up and running. You can check system logs or use transaction SM51 to see the status of application servers.
  
  
  
  Adjust Timeout Settings:
  
  If timeouts are an issue, consider increasing the timeout settings in the RFC destination configuration.
  
  
  
  Review System Logs:
  
  Check the system logs (transaction SM21) for any additional error messages that may provide more context about the issue.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address known issues related to RFC communication errors.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  SU01: User Maintenance
  SM51: List of Active Application Servers
  
  
  
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance, providing them with detailed error logs and system information.
  
  
  By systematically checking these areas, you should be able to identify and resolve the cause of the "RS_EXCEPTION104 RFC communication error."