What Dan said above, plus there is a “feature” in certain E10 versions that means it will only show if it is ticked as “All Companies” when saving the customisation.
You’ll see from my code example that my COM Port is COM11 - it isn’t a local port. It’s actually a virtual port, created by a Lantronix Serial-Ethernet Adapter:
There is a free piece of software on them website called CPR (COM Port Redirector). It receives data on a virtual local port on a PC, and then directs it over the network to the device shown above which connects to the physical serial device. It’s worked great since I put it in, and means that a serial device can be accessed anywhere in the world. I believe you could have multiple PCs with the software installed, all accessing the same device. It opens a connection, makes the request, then closes it out again.