64 is what I intend but tried both
if you have 64-bit architecture and installed the packages for 32-bit, you will get an error and vice-versa. Please check this on the machine you want to install on. You can do this by running uname -m
in a terminal.
If it shows: x86_64, you need amd64 deb which is here: https://www.nomachine.com/download/download&id=3
Is this what you installed?
If you have tried installing different packages, and then uninstalling without removing /usr/NX dir
you may have some leftovers from the wrong 32-bit package which need clearing out. It would be a good idea to start from scratch.
sudo dpkg --purge nomachine
sudo rm -rf /usr/NX /etc/NX
and install again.