How To Fix JBDEXP121 - Error during RFC call. No free resources available

SAP Error Message - Details

• Message type: E = Error

• Message class: JBDEXP - Messages for Change Pointer and Extract Program

• Message number: 121

• Message text: Error during RFC call. No free resources available

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message JBDEXP121 - Error during RFC call. No free resources available ?

  The SAP error message JBDEXP121 indicates that there was an error during a Remote Function Call (RFC) due to a lack of available resources. This typically occurs when the system is unable to allocate the necessary resources to process the RFC request, which can be caused by various factors.
  Causes:
  
  Resource Limitations: The system may have reached its limit for concurrent RFC calls or other resource constraints (e.g., memory, CPU).
  Configuration Issues: The RFC destination may not be configured correctly, or there may be issues with the connection settings.
  System Load: High system load or performance issues can lead to resource exhaustion.
  Network Issues: Problems with the network can also cause delays or failures in establishing RFC connections.
  Background Jobs: If there are too many background jobs running, it can lead to resource contention.
  
  Solutions:
  
  Check System Resources: Monitor the system's resource usage (CPU, memory, etc.) to identify any bottlenecks. Use transaction codes like SM50 (for process overview) and SM66 (for global process overview) to check active processes.
  Increase Resource Limits: If the system is consistently running out of resources, consider increasing the limits for RFC connections. This can be done in the SAP profile parameters (e.g., rfc/max_connections).
  Review RFC Configuration: Ensure that the RFC destination is correctly configured. Check the settings in transaction SM59 for any misconfigurations.
  Optimize Background Jobs: Review and optimize background jobs to reduce the load on the system. You can use transaction SM37 to monitor and manage background jobs.
  Check for Locks: Use transaction SM12 to check for any locks that might be preventing resources from being allocated.
  Network Diagnostics: If network issues are suspected, perform network diagnostics to ensure that there are no connectivity problems between the systems involved in the RFC call.
  Restart Services: In some cases, restarting the SAP instance or relevant services can help free up resources.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  System Logs: Review system logs (transaction SM21) for any related error messages or warnings that could provide more context about the issue.
  Performance Monitoring: Utilize tools like SAP Solution Manager or other performance monitoring tools to analyze system performance and identify potential issues.
  
  If the problem persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.