Error 54 on Simple TCP Create Listener

[CAC10268]

I am getting an error 54 on a very simple TCP Create Listener function. Has anyone else experienced this behavior? Using Ubuntu 20.04.4 LTS with LabVIEW 2021 f2 (64-bit).

 

[altenbach]

Did you read the error message? We can't even tell from the blurry picture what's wired to where and what the values are.

Please attach your VI instead.

[CAC10268]

I apologize for the low res image. I was simply creating a listener on port 502 to communicate via Modbus. I found the reason why I am receiving an error. Ports below 1024 are restricted on Linux/Unix as a general rule - only apps with root privileges can listen on those. Starting LabVIEW with sudo allowed me to use port 502.