How To Fix OL857 - RFC resource error: & & & &

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 857

• Message text: RFC resource error: & & & &

What causes this issue?

Resource problems occurred executing a method asynchronously.

How to fix this error?

Try again later.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OL857 - RFC resource error: & & & & ?

  The SAP error message OL857, which indicates an "RFC resource error," typically arises when there are issues related to the Remote Function Call (RFC) connections in the SAP system. This error can occur due to various reasons, including resource limitations, configuration issues, or network problems.
  Causes of OL857 RFC Resource Error:
  
  
  Resource Limitations: The SAP system may have reached its limit for the number of concurrent RFC connections. This can happen if there are too many active users or processes trying to connect to the system simultaneously.
  
  
  Configuration Issues: Incorrect settings in the SAP system configuration, such as the number of allowed RFC connections, can lead to this error.
  
  
  Network Problems: Issues with the network, such as connectivity problems or firewall restrictions, can prevent successful RFC communication.
  
  
  System Performance: If the SAP system is under heavy load or experiencing performance issues, it may not be able to handle additional RFC requests.
  
  
  Authorization Issues: Sometimes, the user or system trying to establish the RFC connection may not have the necessary authorizations.
  
  
  Solutions to OL857 RFC Resource Error:
  
  
  Check RFC Connections:
  
  Use transaction code SM59 to check the status of RFC destinations. Ensure that the connections are configured correctly and are active.
  
  
  
  Increase RFC Connection Limits:
  
  If the system is reaching its limit for concurrent connections, consider increasing the maximum number of allowed connections. This can be done in the instance profile parameters (e.g., rfc/max_connections).
  
  
  
  Monitor System Performance:
  
  Use transaction ST02 (Tune Summary) and ST03N (Workload Analysis) to monitor system performance and identify any bottlenecks.
  
  
  
  Check Network Configuration:
  
  Ensure that there are no network issues affecting the RFC connections. Check firewalls, routers, and network settings.
  
  
  
  Review Authorizations:
  
  Verify that the user or system has the necessary authorizations to establish RFC connections.
  
  
  
  Restart the SAP Instance:
  
  In some cases, restarting the SAP instance can help clear up any temporary issues causing the error.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  ST02: Tune Summary
  ST03N: Workload Analysis
  SM21: System Log (to check for related error messages)
  
  
  
  SAP Documentation: Refer to the official SAP documentation for more detailed information on RFC configuration and troubleshooting.
  
  
  If the issue persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.