How To Fix /PF1/FH_CONV_XML021 - No free resources. Converter runs in sequential mode

SAP Error Message - Details

• Message type: E = Error

• Message class: /PF1/FH_CONV_XML -

• Message number: 021

• Message text: No free resources. Converter runs in sequential mode

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 /PF1/FH_CONV_XML021 - No free resources. Converter runs in sequential mode ?

  The SAP error message /PF1/FH_CONV_XML021 No free resources. Converter runs in sequential mode typically indicates that the system is unable to allocate sufficient resources (like memory or processing power) to perform a conversion task in parallel mode. Instead, it defaults to running in sequential mode, which can significantly slow down processing times.
  Causes:
  
  Resource Limitations: The system may be running low on available resources, such as memory or CPU, which prevents it from executing tasks in parallel.
  Configuration Settings: The settings for parallel processing may not be properly configured, leading to the system being unable to utilize available resources effectively.
  High Load: If the system is under heavy load due to multiple concurrent processes, it may not have enough resources to allocate for the conversion task.
  System Parameters: Certain SAP parameters related to parallel processing may be set too low, limiting the number of parallel processes that can be executed.
  
  Solutions:
  
  Check System Resources: Monitor the system's memory and CPU usage. If resources are low, consider increasing the available resources (e.g., adding more memory or CPU capacity).
  Adjust Configuration: Review and adjust the configuration settings for parallel processing in the SAP system. This may involve changing parameters in transaction RZ10 or RZ11 related to parallel processing.
  Reduce Load: If the system is under heavy load, try to reduce the number of concurrent processes or schedule the conversion task during off-peak hours.
  Review Background Jobs: Check for any long-running or stuck background jobs that may be consuming resources. Terminate or optimize these jobs if necessary.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on optimizing resource allocation for conversion tasks.
  System Restart: In some cases, a system restart may help clear up resource allocation issues.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SM37 to monitor background jobs and SM66 to check active processes across the system.
  SAP Documentation: Refer to SAP Help Portal or specific documentation related to the conversion process you are working with for more detailed guidance.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools to analyze and optimize system performance.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.