How To Fix 00645 - Internal TSKH error, session terminated

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 645

• Message text: Internal TSKH error, session terminated

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message 00645 - Internal TSKH error, session terminated ?

  The SAP error message "00645 Internal TSKH error, session terminated" typically indicates an internal issue within the SAP system, specifically related to the task handler (TSKH). This error can occur due to various reasons, including:
  Causes:
  
  System Resource Issues: Insufficient memory or CPU resources can lead to internal errors.
  Corrupted Data: Corruption in the database or application data can trigger this error.
  Configuration Issues: Incorrect configuration settings in the SAP system can lead to task handler errors.
  Software Bugs: There may be bugs in the SAP software or specific patches that have not been applied.
  Network Issues: Problems with network connectivity can cause session termination.
  
  Solutions:
  
  Check System Resources: Monitor the system's memory and CPU usage. If resources are low, consider increasing them or optimizing the system.
  Review Logs: Check the SAP system logs (transaction SM21) and developer traces (transaction ST22) for more detailed error messages that can provide insights into the root cause.
  Database Consistency Check: Run consistency checks on the database to identify and fix any corrupted data.
  Update SAP Software: Ensure that your SAP system is up to date with the latest patches and updates. Check the SAP Support Portal for any relevant notes or patches.
  Configuration Review: Review the configuration settings in the SAP system to ensure they are correct and optimal.
  Restart the Application Server: Sometimes, simply restarting the application server can resolve transient issues.
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with detailed logs and error messages for better diagnosis.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SM21 (System Log), ST22 (Dump Analysis), and SM37 (Job Monitoring) to gather more information about the error.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error.
  System Monitoring: Implement regular monitoring of system performance and health to proactively identify issues before they lead to errors.
  
  By following these steps, you should be able to diagnose and potentially resolve the "00645 Internal TSKH error, session terminated" issue in your SAP system.