-
It doesn’t necessarily mean that the port is not available, but that there is currently no process listening on it.
If you are expecting a server to be running on that port, you might want to check what’s up with it – it might be crashing or hanging in an error trap, not reaching the point where it opens the port.
If you are just experimenting, you first need to start a second q process with the command line parameters -p 5001 which will make it listen on that port.