How To Fix SG021 - Operating system & unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: SG - Global Pool for Cross-Application Developments

• Message number: 021

• Message text: Operating system & unknown

What causes this issue?

No entry was found in the conversion table for operating system &V1&.

System Response

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

How to fix this error?

Make an entry for the operating system in the conversion table using
the transaction FILE.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SG021 - Operating system & unknown ?

  The SAP error message SG021, which states "Operating system & unknown," typically indicates that there is an issue related to the operating system environment in which the SAP system is running. This error can arise from various underlying causes, and addressing it often requires a systematic approach to identify and resolve the issue.
  Possible Causes:
  
  Operating System Compatibility: The version of the operating system may not be compatible with the version of SAP you are using.
  File System Issues: There may be problems with the file system, such as corruption or insufficient permissions.
  Resource Limitations: The system may be running out of resources (e.g., memory, disk space).
  Configuration Errors: Incorrect configuration settings in the SAP system or the operating system can lead to this error.
  Network Issues: If the SAP system relies on network resources, issues with network connectivity can trigger this error.
  Missing or Corrupted Files: Essential files required for SAP operation may be missing or corrupted.
  
  Solutions:
  
  Check Compatibility: Ensure that the operating system version is compatible with the SAP version you are using. Refer to SAP's Product Availability Matrix for guidance.
  Review System Logs: Check the operating system logs and SAP logs (e.g., dev_w0, dev_rfc) for more detailed error messages that can provide insight into the issue.
  Verify Permissions: Ensure that the SAP user has the necessary permissions to access required files and directories.
  Monitor Resources: Use system monitoring tools to check for resource usage (CPU, memory, disk space) and address any limitations.
  Configuration Review: Review the configuration settings in both the SAP system and the operating system to ensure they are set correctly.
  Network Diagnostics: If applicable, check network connectivity and configurations to ensure that all required services are reachable.
  File Integrity Check: Verify the integrity of the SAP installation files and replace any corrupted files if necessary.
  Restart Services: Sometimes, simply restarting the SAP services or the entire server can resolve transient issues.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to SG021 for any specific patches or updates that may address the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Refer to the official SAP documentation for troubleshooting steps related to operating system errors.
  
  If the issue persists after trying the above solutions, it may be beneficial to contact SAP support for further assistance, providing them with detailed logs and information about the environment.