How To Fix GW221 - Communication terminated

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 221

• Message text: Communication terminated

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 GW221 - Communication terminated ?

  The SAP error message GW221 ("Communication terminated") typically indicates that there is a problem with the communication between the SAP system and an external system or service. This error can occur in various scenarios, such as when using SAP Gateway, RFC (Remote Function Call), or when connecting to external services via HTTP/SOAP.
  Causes of GW221 Error
  
  Network Issues: Problems with the network connection, such as timeouts, disconnections, or firewall restrictions, can lead to this error.
  Service Unavailability: The external service or system you are trying to connect to may be down or not reachable.
  Configuration Errors: Incorrect configuration settings in the SAP system or the external system can cause communication failures.
  Protocol Mismatch: If there is a mismatch in the communication protocols (e.g., HTTP vs. HTTPS), it can lead to termination of communication.
  Timeout Settings: If the response time from the external service exceeds the timeout settings configured in SAP, it may result in this error.
  Resource Limitations: Insufficient resources (e.g., memory, CPU) on either the SAP system or the external system can lead to communication issues.
  
  Solutions to GW221 Error
  
  Check Network Connectivity: Ensure that the network connection between the SAP system and the external service is stable. You can use tools like ping or traceroute to diagnose network issues.
  Verify Service Availability: Check if the external service is up and running. You can do this by trying to access the service directly (e.g., via a web browser or a REST client).
  Review Configuration Settings: Double-check the configuration settings in both the SAP system and the external service. Ensure that the endpoints, ports, and protocols are correctly configured.
  Adjust Timeout Settings: If the external service takes longer to respond, consider increasing the timeout settings in the SAP system.
  Check Firewall Rules: Ensure that there are no firewall rules blocking the communication between the SAP system and the external service.
  Monitor System Resources: Check the resource usage on both the SAP system and the external service. If either system is under heavy load, consider optimizing performance or scaling resources.
  Review Logs: Check the SAP application logs (transaction SLG1) and the system logs for any additional error messages or warnings that could provide more context about the issue.
  
  Related Information
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific scenarios related to the GW221 error.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review the official SAP documentation for the specific components you are using (e.g., SAP Gateway, RFC) for best practices and troubleshooting tips.
  
  By following these steps, you should be able to diagnose and resolve the GW221 error effectively. If the issue persists, consider reaching out to SAP support for further assistance.