How To Fix GW012 - Connection to &1 / &2 failed

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 012

• Message text: Connection to &1 / &2 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.

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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 GW012 - Connection to &1 / &2 failed ?

  The SAP error message GW012 indicates that there is a failure in establishing a connection to a specified system or service. The placeholders &1 and &2 typically represent the target system's hostname and service name or port number, respectively. This error is often related to issues with the SAP Gateway or network connectivity.
  Causes of GW012 Error
  
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system. This could be due to firewalls, routing issues, or network outages.
  
  
  Incorrect Configuration: The connection parameters (hostname, port, etc.) may be incorrectly configured in the SAP system.
  
  
  Service Not Running: The target service (like an SAP Gateway or an application server) may not be running or may have crashed.
  
  
  Authorization Issues: The user may not have the necessary authorizations to access the target system.
  
  
  DNS Resolution Problems: The hostname may not be resolving correctly due to DNS issues.
  
  
  SAP Gateway Configuration: The SAP Gateway may not be properly configured to connect to the target system.
  
  
  Solutions to GW012 Error
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to check if the target system is reachable.
  Ensure that there are no firewall rules blocking the connection.
  
  
  
  Verify Connection Parameters:
  
  Go to transaction SM59 in the SAP GUI and check the RFC destination settings for the target system.
  Ensure that the hostname and port are correct.
  
  
  
  Check Target Service Status:
  
  Ensure that the target service (like the SAP Gateway) is running. You can check this on the target server.
  
  
  
  Review Authorizations:
  
  Ensure that the user has the necessary authorizations to connect to the target system.
  
  
  
  DNS Configuration:
  
  Check the DNS settings to ensure that the hostname resolves correctly. You can also try using the IP address instead of the hostname.
  
  
  
  SAP Gateway Configuration:
  
  Review the SAP Gateway settings in transaction SMGW to ensure that it is configured correctly.
  
  
  
  Check Logs:
  
  Review the system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that might provide more context.
  
  
  
  Restart Services:
  
  If the service is down, restarting the relevant services or the entire server may resolve the issue.
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SMGW: SAP Gateway Monitor
  SM21: System Log
  ST22: Dump Analysis
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to the GW012 error.
  
  
  Documentation: Refer to SAP documentation for detailed information on configuring RFC connections and troubleshooting connectivity issues.
  
  
  By following these steps, you should be able to diagnose and resolve the GW012 error in your SAP environment.