41CL Self-Update

[Neve]

This is the first time I’m trying to link and update any CL board.
I received my new V5 a couple of days ago.
I can’t update. I followed the instructions, but when I get to the part where I have to plug the serial connector to the Mac and run the JAVA command line, I get an error message saying something like: “Error opening port com3...”
After a while the calculator displays “TIMEOUT” or sometimes “HR or HS ERROR”, can’t remember which one.

I am doing XEQ CMOPEN before I hit ENTER on the terminal.

What am I doing wrong?