How To Fix RSAR503 - An RFC call-up triggered the exception

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAR - Data Transfer and Metadata Maintenance

• Message number: 503

• Message text: An RFC call-up triggered the exception

What causes this issue?

The call-up of a function to another system (RFC call-up) has reported
an error situation.
A detailed error description is not available.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

After confirming this message a list of all of the application logs
that come into question will be displayed. Detailed information as to
the cause of the error can be found in this log.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSAR503 - An RFC call-up triggered the exception ?

  The SAP error message RSAR503, which states "An RFC call-up triggered the exception," typically occurs in the context of Remote Function Call (RFC) communications between SAP systems. This error indicates that an exception was raised during the execution of an RFC function module, which can be due to various reasons.
  Causes:
  
  Network Issues: Problems with the network connection between the SAP systems can lead to RFC call failures.
  Authorization Issues: The user executing the RFC call may not have the necessary authorizations to perform the requested operation.
  Function Module Errors: The called function module may have internal errors or may not be implemented correctly.
  Data Issues: Invalid or unexpected data being passed to the function module can cause exceptions.
  System Configuration: Incorrect configuration of the RFC destination or the target system can lead to this error.
  Timeouts: If the RFC call takes too long to execute, it may time out and trigger an exception.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the systems involved in the RFC call. You can use tools like ping or traceroute to diagnose connectivity.
  Review Authorizations: Verify that the user executing the RFC call has the necessary authorizations for the function module being called.
  Debug the Function Module: If you have access to the source code, debug the function module to identify any internal errors or exceptions being raised.
  Validate Input Data: Check the data being passed to the function module for validity and correctness. Ensure that it meets the expected format and constraints.
  Check RFC Destination Configuration: Review the configuration of the RFC destination in transaction SM59 to ensure it is set up correctly.
  Increase Timeout Settings: If timeouts are suspected, consider increasing the timeout settings for the RFC call in the relevant configuration.
  Check System Logs: Review the system logs (transaction SM21) and the application logs (transaction SLG1) for more detailed error messages that can provide additional context.
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM59: To manage RFC destinations.
  SM21: To view system logs.
  SLG1: To view application logs.
  SE37: To view and debug function modules.
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address specific issues related to the RSAR503 error.
  
  
  Documentation: Review the official SAP documentation for RFC and function modules to understand their behavior and error handling.
  
  
  If the issue persists after trying the above solutions, it may be beneficial to engage SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.