Well you have to know that you are in a COMMAND-box when using NET USE… And therefore you cannot use ‘\something\xxx’ - You can not use the single quote sign. You have to find the correct printername (that is why your NAV code does not work!!!)
You have to find the DNS-name of your printer.
So start with nbtstat -a 192.168.1.121 and find the name of the “printer-server”
Mine is HP9A6648
I know that the name of my pirnter is N911A
So I have to do a
NET USE LPT1: \HP9A6648\N911a /persistent:Yes
If you cannot find your printers correct name…then you need to find a network expert to help you - You have to be able to print from command line in order to “translate” it into the correct naming in NAV-code…
PRINTING to a simple printer is one of the most complicated things to do.