How To Fix OL802 - RFC system error: & & & &

SAP Error Message - Details

• Message type: E = Error

• Message class: OL - Workflow object types: Run-time system

• Message number: 802

• Message text: RFC system error: & & & &

What causes this issue?

A system error occurred when a function module was called in another
system.

How to fix this error?

Please inform your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OL802 - RFC system error: & & & & ?

  The SAP error message OL802, which indicates an RFC (Remote Function Call) system error, can be caused by various issues related to the communication between SAP systems or between an SAP system and an external system. The error message typically includes placeholders (represented by "& & & &") that may provide additional context or specific details about the error.
  Possible Causes:
  
  
  Network Issues: Problems with the network connection between the SAP systems can lead to RFC errors. This could include issues like firewalls blocking traffic, network outages, or misconfigured network settings.
  
  
  Configuration Errors: Incorrect configuration of RFC destinations in the SAP system can cause communication failures. This includes incorrect settings in 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, leading to an inability to establish an RFC connection.
  
  
  Resource Limitations: The SAP system may be experiencing resource limitations, such as memory or CPU constraints, which can affect its ability to process RFC calls.
  
  
  Version Compatibility: Incompatibility between different versions of SAP systems can also lead to RFC errors.
  
  
  Solutions:
  
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the systems involved. You can use tools like ping or traceroute to diagnose network issues.
  
  
  Review RFC Destination Configuration: Go to transaction SM59 and check the configuration of the RFC destination. Ensure that the connection parameters (like target host, system number, client, user, and password) are correct.
  
  
  Check Authorizations: Verify that the user credentials used for the RFC connection have the necessary authorizations to execute the required functions.
  
  
  System Status: Check the status of the target system to ensure it is up and running. You can do this by logging into the target system or checking system logs.
  
  
  Monitor System Resources: Use transaction SM50 or SM66 to monitor the system's performance and check for any resource bottlenecks.
  
  
  Check SAP Notes: Look for relevant SAP Notes that may address known issues related to the OL802 error. You can search for notes in the SAP Support Portal.
  
  
  Review Logs: Check the system logs (transaction SM21) and the developer trace files (transaction ST11) for any additional error messages or clues that can help diagnose the issue.
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM59: RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  ST11: Developer Traces
  SM50/SM66: Process Overview
  
  
  
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance, providing them with the error details and any relevant logs.
  
  
  By following these steps, you should be able to diagnose and resolve the OL802 RFC system error in your SAP environment.