How To Fix GW499 - Failed to read the THOST table

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 499

• Message text: Failed to read the THOST table

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 GW499 - Failed to read the THOST table ?

  The SAP error message GW499, which states "Failed to read the THOST table," typically indicates an issue with the Gateway service in SAP. The THOST table is part of the SAP Gateway framework and contains information about the registered hosts in the system. When this error occurs, it can be due to several reasons, including configuration issues, network problems, or database inconsistencies.
  Causes:
  
  Database Issues: The THOST table may be corrupted or not accessible due to database issues.
  Authorization Problems: The user may not have the necessary authorizations to read the THOST table.
  Gateway Configuration: There may be misconfigurations in the SAP Gateway settings.
  Network Issues: Problems with network connectivity can prevent access to the required resources.
  System Load: High system load or performance issues may lead to timeouts or failures in reading the table.
  
  Solutions:
  
  Check Database Connectivity: Ensure that the database is up and running and that there are no connectivity issues.
  Verify Authorizations: Check the user authorizations to ensure that the user has the necessary permissions to access the THOST table.
  Review Gateway Configuration: Check the configuration settings for the SAP Gateway. Ensure that the gateway is properly configured and that all necessary services are running.
  Check for System Load: Monitor the system performance and load. If the system is under heavy load, consider optimizing performance or scheduling tasks during off-peak hours.
  Restart Gateway Services: Sometimes, simply restarting the SAP Gateway services can resolve transient issues.
  Database Consistency Check: Perform a consistency check on the database to ensure that the THOST table is not corrupted.
  Check SAP Notes: Look for any relevant SAP Notes that may address this specific error. SAP frequently releases updates and patches that can resolve known issues.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SMGW (Gateway Monitor) to monitor the status of the SAP Gateway and check for any errors or warnings.
  Logs: Review the system logs (transaction SM21) and the Gateway logs (transaction SMGW) for any additional error messages or warnings that could provide more context.
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  By following these steps, you should be able to diagnose and resolve the GW499 error in your SAP system.