How To Fix GW036 - Network buffer written to trace file

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 036

• Message text: Network buffer written to trace file

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 GW036 - Network buffer written to trace file ?

  The SAP error message GW036, which states "Network buffer written to trace file," typically indicates that there is an issue with the network communication between the SAP system and the client or between different SAP systems. This message is often related to the Gateway service in SAP, which handles communication between different SAP systems and external applications.
  Cause:
  
  Network Issues: There may be network connectivity problems, such as packet loss, high latency, or misconfigured network settings.
  Buffer Overflow: The message can indicate that the network buffer has reached its limit, causing data to be written to a trace file instead of being processed normally.
  Configuration Issues: Incorrect settings in the SAP Gateway configuration or in the RFC (Remote Function Call) destination can lead to this error.
  Resource Limitations: Insufficient system resources (CPU, memory) can also contribute to this issue, especially under heavy load.
  Firewall or Security Settings: Firewalls or security settings may be blocking or limiting the network traffic.
  
  Solution:
  
  Check Network Connectivity: Ensure that there are no network issues between the SAP system and the client or other systems. Use tools like ping or traceroute to diagnose connectivity.
  Review Gateway Configuration: Check the configuration of the SAP Gateway. Ensure that the parameters related to network buffers are set correctly. You can use transaction SMGW to monitor the Gateway and check for any errors.
  Increase Buffer Size: If the buffer size is too small, consider increasing it. This can be done in the SAP profile parameters (e.g., gw/MaxConnections, gw/MaxDataSize).
  Monitor System Resources: Use transaction SM50 or SM66 to monitor system performance and check for any resource bottlenecks.
  Check Trace Files: Review the trace files generated by the Gateway for more detailed error messages. The trace files can usually be found in the directory specified by the DIR_TRACE parameter.
  Firewall Settings: Ensure that firewalls or security settings are not blocking the necessary ports for SAP communication (typically port 3200 for the Gateway).
  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:
  
  Transaction Codes: 
  
  SMGW: Gateway Monitor
  SM21: System Log
  ST22: Dump Analysis
  SMLG: Logon Groups
  
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on Gateway configuration and troubleshooting.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar 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.