How To Fix GW463 - Communication system error; remote allocate failed

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 463

• Message text: Communication system error; remote allocate 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GW463 - Communication system error; remote allocate failed ?

  The SAP error message GW463, which states "Communication system error; remote allocate failed," typically indicates a problem with the communication between the SAP system and a remote system or service. This error can occur in various scenarios, such as when trying to connect to an external system, during remote function calls (RFC), or when using the SAP Gateway.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the remote system.
  Configuration Errors: Incorrect configuration settings in the SAP system or the remote system can lead to communication failures.
  Resource Limitations: The remote system may be experiencing resource limitations (e.g., memory, CPU) that prevent it from processing the request.
  Firewall or Security Settings: Firewalls or security settings may be blocking the communication between the systems.
  SAP Gateway Issues: Problems with the SAP Gateway configuration or its services can also lead to this error.
  Version Compatibility: Incompatibility between different versions of SAP systems or components can cause communication failures.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the SAP system and the remote system. You can use tools like ping or traceroute to diagnose network issues.
  Review Configuration Settings: Verify the configuration settings in both the SAP system and the remote system. Ensure that the RFC destinations are correctly set up and that the necessary authorizations are in place.
  Monitor Resource Usage: Check the resource usage on the remote system to ensure it is not overloaded. If necessary, optimize the system or allocate more resources.
  Firewall and Security Settings: Review firewall rules and security settings to ensure that they allow communication between the SAP systems.
  Check SAP Gateway Configuration: Ensure that the SAP Gateway is properly configured and that all necessary services are running. You can use transaction code SMGW to monitor the Gateway.
  Update or Patch Systems: Ensure that both the SAP system and the remote system are up to date with the latest patches and updates, as this can resolve compatibility issues.
  Check Logs: Review the system logs (transaction codes SM21, SLG1, etc.) for any additional error messages or warnings that may provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  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 information on configuring RFC connections and troubleshooting communication issues.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.