How To Fix GW455 - System call error; erro with signal function

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 455

• Message text: System call error; erro with signal function

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 GW455 - System call error; erro with signal function ?

  The SAP error message GW455, which indicates a "System call error; error with signal function," typically arises in the context of the SAP Gateway or when dealing with communication between SAP systems and external systems. This error can be caused by various factors, including issues with the operating system, network problems, or configuration errors.
  Possible Causes:
  
  Operating System Issues: The error may be related to the underlying operating system, such as resource limitations, process management issues, or system calls failing due to misconfiguration.
  Network Problems: If there are network connectivity issues, such as firewalls blocking communication or DNS resolution problems, this can lead to signal function errors.
  Configuration Errors: Incorrect settings in the SAP Gateway configuration or in the RFC (Remote Function Call) settings can lead to this error.
  Resource Limitations: Insufficient memory or CPU resources on the server can cause system calls to fail.
  SAP Kernel Issues: Bugs or issues in the SAP kernel version being used can also lead to this error.
  
  Solutions:
  
  Check System Logs: Review the system logs (transaction SM21) and the developer trace files (transaction ST22) for more detailed error messages that can provide insights into the root cause.
  Review Configuration: Ensure that the SAP Gateway and RFC configurations are correct. Check transaction SMGW for the Gateway monitor and ensure that all settings are properly configured.
  Network Diagnostics: Use tools like ping, traceroute, or telnet to check network connectivity between the SAP system and any external systems it communicates with.
  Resource Monitoring: Monitor system resources (CPU, memory, disk space) to ensure that the server is not under heavy load or running out of resources.
  Kernel Upgrade: If the issue persists, consider upgrading to a newer version of the SAP kernel, as the problem may be related to a known bug that has been fixed in later releases.
  Restart Services: Sometimes, simply restarting the SAP Gateway or the entire SAP system can resolve transient issues.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  SAP Support: If the issue cannot be resolved through the above steps, consider reaching out to SAP Support for assistance. Provide them with detailed logs and error messages to facilitate troubleshooting.
  Documentation: Review the official SAP documentation for the Gateway and related components to ensure that all configurations are in line with best practices.
  
  By following these steps, you should be able to diagnose and potentially resolve the GW455 error in your SAP environment.