How To Fix DT691 - Log could not be read

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 691

• Message text: Log could not be read

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT691 - Log could not be read ?

  The SAP error message DT691, which states "Log could not be read," typically occurs when there is an issue accessing the log files associated with a particular process or transaction in SAP. This error can arise in various contexts, such as during data transfer, batch processing, or when trying to view logs for specific transactions.
  Causes:
  
  Log File Deletion: The log file may have been deleted or is no longer available in the system.
  Authorization Issues: The user may not have the necessary authorizations to access the log files.
  Database Issues: There could be issues with the database that prevent the log from being read.
  Corrupted Log Files: The log files may be corrupted or not properly written.
  System Configuration: Incorrect configuration settings in the system may lead to issues in log retrieval.
  
  Solutions:
  
  Check Log Availability: Verify if the log file exists in the expected location. If it has been deleted, you may need to regenerate the log or check if it can be restored.
  User Authorizations: Ensure that the user has the necessary authorizations to access the logs. You may need to consult with your SAP security team to adjust roles and permissions.
  Database Check: Perform a database check to ensure that there are no underlying issues affecting log file access. This may involve checking for database locks or inconsistencies.
  Log File Integrity: If you suspect that the log files are corrupted, you may need to investigate further or consult SAP support for recovery options.
  System Configuration Review: Review the system configuration settings related to logging and ensure they are set up correctly. This may involve checking transaction settings or system parameters.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates available that resolve the issue.
  
  Related Information:
  
  Transaction Codes: Depending on the context of the error, you may want to check transaction codes like SLG1 (Application Log) or SM21 (System Log) to gather more information about the logs and any related errors.
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide more detailed diagnostics and troubleshooting steps.
  Documentation: Review SAP documentation related to logging and error handling for additional insights and best practices.
  
  By following these steps, you should be able to diagnose and potentially resolve the DT691 error in your SAP system.