LabVIEW Network Streams Stop Responding on Windows 11

Issue Details

I developed an application for my cRIO-9047 controller that uses network streams to communicate with an external Human Machine Interface (HMI) running on a PC. My application has been working correctly until I upgraded the HMI from Windows 10 to Windows 11.  Since then, I have noticed that after the program runs for some time, the buttons on the HMI stop responding, and I am unable to send commands and messages to the controller when this happens. To recover from this behavior, I need to restart the HMI, and as soon as the restart begins, the queued commands are executed on the cRIO. After the restart, the buttons, commands and responses work correctly for some time until the issue occurs again. 

I have already verified that the firewall configuration is correct, according to the recommendations listed in Recommended Firewall Settings When Using Network Streams, so I am not sure what the problem is. 

Solution

This behavior may be related to Ethernet energy‑saving features introduced in Windows 11. These features can interfere with continuous network communication and may impact the performance of network streams. To resolve the issue and ensure proper functionality, please disable the following options on your PC:

1. Open Device Manager on Windows. 
2. Locate the network adapter used in your application. 
3. Right-click on the adapter and select Properties.

4. Navigate to the Advanced tab.
5. Find the Energy-Efficient Ethernet property and set its Value to Disabled. 

6. Look for the Green Ethernet property and set its Value to Disabled.

7. Navigate to the Power Management tab.
8. Uncheck the Allow the computer to turn off this device to save power option.

9. Click on OK to apply the changes.