How To Fix NET039 - Network response times at TCP level

SAP Error Message - Details

• Message type: E = Error

• Message class: NET - Network Messages

• Message number: 039

• Message text: Network response times at TCP level

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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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 NET039 - Network response times at TCP level ?

  The SAP error message NET039 indicates that there are issues with network response times at the TCP level. This error typically arises when there are delays in communication between the SAP application server and the client, which can be caused by various factors. Here’s a breakdown of the potential causes, solutions, and related information:
  Causes of NET039
  
  
  Network Latency: High latency in the network can lead to slow response times. This can be due to physical distance, network congestion, or poor routing.
  
  
  Firewall or Security Settings: Firewalls or security appliances may be inspecting or throttling traffic, leading to delays.
  
  
  Server Performance: If the SAP application server is under heavy load or experiencing performance issues, it may not respond quickly to requests.
  
  
  TCP Configuration: Misconfigured TCP settings, such as window size or timeout settings, can lead to inefficient communication.
  
  
  Network Hardware Issues: Problems with routers, switches, or other network hardware can cause packet loss or delays.
  
  
  DNS Resolution Issues: Slow DNS resolution can delay the establishment of TCP connections.
  
  
  Solutions
  
  
  Network Monitoring: Use network monitoring tools to identify latency issues and bottlenecks in the network. Tools like Wireshark or network performance monitoring solutions can help.
  
  
  Optimize Network Configuration: Ensure that network devices are configured optimally. This includes checking MTU sizes, TCP window sizes, and ensuring that there are no unnecessary hops in the network path.
  
  
  Check Server Performance: Monitor the performance of the SAP application server. Ensure that it has adequate resources (CPU, memory, etc.) and is not overloaded.
  
  
  Review Firewall Settings: Check firewall and security appliance settings to ensure they are not causing delays. Consider whitelisting SAP traffic or adjusting inspection settings.
  
  
  DNS Configuration: Ensure that DNS servers are responsive and that there are no issues with DNS resolution. Consider using a local DNS cache to speed up resolution times.
  
  
  Network Hardware Check: Inspect network hardware for faults or misconfigurations. Replace or repair any faulty equipment.
  
  
  SAP Notes and Patches: Check for any relevant SAP Notes or patches that may address known issues related to network performance.
  
  
  Related Information
  
  
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance. They may have specific recommendations based on your system configuration and version.
  
  
  Documentation: Review SAP documentation related to network performance and troubleshooting. This can provide insights into best practices for configuring SAP systems in a networked environment.
  
  
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed. Other users may have encountered and resolved similar problems.
  
  
  By systematically addressing the potential causes and implementing the suggested solutions, you can work towards resolving the NET039 error and improving network response times in your SAP environment.