How To Fix GW477 - Communication system error; confirm failed

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 477

• Message text: Communication system error; confirm 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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Smart SAP Assistant

• What is the cause and solution for SAP error message GW477 - Communication system error; confirm failed ?

  The SAP error message GW477, which indicates a "Communication system error; confirm failed," typically arises in the context of SAP Gateway or when there are issues with communication between SAP systems or between an SAP system and an external system. This error can occur during various operations, such as when trying to send or receive data via OData services or when using remote function calls (RFC).
  Causes:
  
  Network Issues: Problems with the network connection between the SAP system and the external system can lead to communication failures.
  Configuration Errors: Incorrect configuration of the SAP Gateway or the destination system can result in communication errors.
  Service Availability: The OData service or the RFC destination may not be active or properly configured.
  Authorization Issues: Lack of proper authorizations for the user or service account trying to perform the operation.
  Timeouts: Long response times from the external system can lead to timeouts and subsequent errors.
  System Load: High load on the SAP system or the external system can cause delays and communication failures.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the SAP system and the external system. You can use tools like ping or traceroute to diagnose network issues.
  Verify Configuration: Check the configuration of the SAP Gateway and the destination system. Ensure that the OData service is correctly registered and active.
  Service Activation: If using OData services, ensure that the service is activated in the SAP Gateway. You can do this using transaction code /IWFND/MAINT_SERVICE.
  Check Authorizations: Ensure that the user or service account has the necessary authorizations to perform the operation. You can check this in transaction SU53 after the error occurs.
  Monitor System Performance: Use transaction SM37 to check for long-running jobs or transaction SM66 to monitor system load. If the system is under heavy load, consider optimizing performance.
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the relevant configuration.
  Review Logs: Check the application logs (transaction SLG1) and the system logs (transaction SM21) for any additional error messages or warnings that could provide more context.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to GW477.
  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 version of SAP you are using, as there may be version-specific considerations.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.