How To Fix SDS_COMMON022 - Unexpected error &1 during calculation of allowed aRFC processes

SAP Error Message - Details

• Message type: E = Error

• Message class: SDS_COMMON -

• Message number: 022

• Message text: Unexpected error &1 during calculation of allowed aRFC processes

What causes this issue?

An unexpected error occurred while retrieving the number of work
processes from the system.

System Response

The processing is cancelled.

How to fix this error?

Contact SAP for assistance.

Procedure for System Administrators

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 SDS_COMMON022 - Unexpected error &1 during calculation of allowed aRFC processes ?

  The SAP error message SDS_COMMON022 indicates that there was an unexpected error during the calculation of allowed asynchronous Remote Function Call (aRFC) processes. This error can occur in various scenarios, often related to system configuration, resource limitations, or issues with the aRFC framework itself.
  Possible Causes:
  
  Configuration Issues: Incorrect settings in the SAP system configuration related to aRFC parameters.
  Resource Limitations: Insufficient system resources (e.g., memory, CPU) to handle the aRFC processes.
  System Bugs: There may be bugs in the SAP kernel or specific components that handle aRFC.
  Database Issues: Problems with the database connection or performance can lead to unexpected errors.
  Transport Layer Issues: Issues in the transport layer that affect communication between different SAP instances.
  
  Solutions:
  
  
  Check Configuration:
  
  Review the configuration settings for aRFC in transaction RZ10 or RZ12. Ensure that parameters like rdisp/wp_no_aRFC are set correctly.
  Verify the settings in transaction SM59 for RFC destinations.
  
  
  
  Monitor System Resources:
  
  Use transaction SM50 or SM66 to monitor the work processes and check if there are any bottlenecks.
  Check system logs in transaction SM21 for any related errors or warnings.
  
  
  
  Update SAP Kernel:
  
  Ensure that your SAP kernel is up to date. Sometimes, upgrading to the latest kernel version can resolve unexpected errors.
  
  
  
  Check Database Performance:
  
  Use transaction DB02 to analyze database performance and check for locks or long-running queries that might affect aRFC processing.
  
  
  
  Review System Logs:
  
  Check the developer trace files (transaction ST22) for any dumps that might provide more context about the error.
  Look into the system log (transaction SM21) for any related messages.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support with detailed logs and error messages for further assistance.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM50 / SM66: Monitor work processes.
  SM21: System log.
  ST22: Dump analysis.
  RZ10 / RZ12: Profile parameters.
  SM59: RFC destinations.
  DB02: Database performance analysis.
  
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide patches.
  
  
  Documentation: Review SAP documentation related to aRFC and performance tuning for additional insights.
  
  
  By following these steps, you should be able to diagnose and potentially resolve the SDS_COMMON022 error in your SAP system.