How To Fix GW464 - Communication system error; deallocate failed

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 464

• Message text: Communication system error; deallocate failed

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 GW464 - Communication system error; deallocate failed ?

  The SAP error message GW464 ("Communication system error; deallocate failed") typically indicates an issue with the SAP Gateway or the communication layer between the SAP system and the client or other systems. This error can arise due to various reasons, including network issues, resource limitations, or configuration problems.
  Causes:
  
  Network Issues: Problems with the network connection between the SAP system and the client or other systems can lead to communication errors.
  Resource Limitations: Insufficient memory or system resources on the SAP server can cause deallocation failures.
  Configuration Errors: Incorrect settings in the SAP Gateway configuration or related components can lead to communication issues.
  System Load: High load on the SAP system can lead to resource contention, causing deallocation failures.
  Software Bugs: There may be bugs in the SAP software or the underlying operating system that lead to this error.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the SAP system and the client. Use tools like ping or traceroute to diagnose connectivity problems.
  Monitor System Resources: Check the memory and CPU usage on the SAP server. If resources are low, consider increasing the available resources or optimizing the system.
  Review Gateway Configuration: Verify the configuration settings for the SAP Gateway. Ensure that all parameters are set correctly and that there are no misconfigurations.
  Restart SAP Services: Sometimes, restarting the SAP Gateway or the entire SAP system can resolve temporary issues.
  Check SAP Notes: Look for relevant SAP Notes in the SAP Support Portal that may address this specific error. SAP frequently releases patches and updates that can resolve known issues.
  Update Software: Ensure that your SAP system is up to date with the latest patches and updates, as these may contain fixes for known bugs.
  Analyze Logs: Check the SAP Gateway logs (transaction SMGW) for more detailed error messages that can provide additional context for the issue.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SMGW (Gateway Monitor) to monitor the status of the SAP Gateway and check for any active connections or errors.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including any relevant logs and system configurations.
  Documentation: Refer to the official SAP documentation for more information on the SAP Gateway and troubleshooting communication errors.
  
  By following these steps, you should be able to diagnose and resolve the GW464 error in your SAP system.