How To Fix GW467 - Communication system error; snaopen failed; check LU

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 467

• Message text: Communication system error; snaopen failed; check LU

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 GW467 - Communication system error; snaopen failed; check LU ?

  The SAP error message GW467 indicates a communication system error related to the SNA (Systems Network Architecture) protocol. The specific message "snaopen failed; check LU" suggests that there is an issue with the Logical Unit (LU) configuration or connectivity.
  Causes:
  
  Incorrect LU Configuration: The Logical Unit (LU) may not be configured correctly in the SAP system or in the network settings.
  Network Issues: There may be network connectivity problems between the SAP system and the SNA server.
  SNA Services Not Running: The necessary SNA services or daemons may not be running on the server.
  Firewall or Security Settings: Firewalls or security settings may be blocking the communication between the SAP system and the SNA server.
  Resource Limitations: The server may be experiencing resource limitations, such as memory or CPU issues, affecting its ability to establish connections.
  
  Solutions:
  
  
  Check LU Configuration:
  
  Verify the configuration of the Logical Unit (LU) in the SAP system. Ensure that the LU name is correct and matches the configuration on the SNA server.
  Check the settings in transaction SM59 for RFC destinations and ensure that the LU is correctly defined.
  
  
  
  Network Connectivity:
  
  Test the network connection between the SAP system and the SNA server. Use tools like ping or traceroute to check connectivity.
  Ensure that the network paths are open and that there are no issues with routing.
  
  
  
  Verify SNA Services:
  
  Check if the SNA services are running on the server. Restart the SNA services if necessary.
  Look for any logs or error messages in the SNA service logs that might provide more context.
  
  
  
  Firewall and Security Settings:
  
  Review firewall settings to ensure that the necessary ports for SNA communication are open.
  Check for any security policies that might be blocking the communication.
  
  
  
  Monitor Resource Usage:
  
  Monitor the server for resource usage (CPU, memory, etc.) to ensure that it is not overloaded.
  If resource limitations are identified, consider optimizing the server or upgrading hardware.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to GW467 for any specific patches or updates that may address this issue.
  Documentation: Review SAP documentation on SNA configuration and troubleshooting for additional guidance.
  Support: If the issue persists, consider reaching out to SAP support for further assistance, providing them with detailed logs and error messages.
  
  By following these steps, you should be able to diagnose and resolve the GW467 error in your SAP environment.