I currently use Mach 3 on an XP desktop system with lpt1 port.
I have purchase a UC100 in order to use a more upto date laptop.

I have installed the UC100 on the desktop XP machine for initial testing and everything is working OK except on loading and exiting Mach3 the (attached jpg) - error message appears!
This message only started after installing the UC100 drivers etc.

I have also installed Mach3 on a laptop with windows 10, transferred my settings to this installation and installed the UC100 drivers. The same message appears on loading and exiting mach3 on the laptop also!
The only difference is the line 1 position number changes by a few characters!

The UC100 is working OK on both the desktop and laptop but wondered what may be causing the error message!

Original licence file found to be corrupt.

Restored original licence problem fixed!