I have bought a computer and installed Mach 3 from a disk and installed the license file. When I try to run Mach 3 I get an error message artcode 200702.

What is error code 200702 and how do I correct it so I can run Mach 3?

I presume that you have solved this by now but since I am encountering the same problem as I develop my custom plugin I also presume it means that you have a corrupted plugin in your Mach3\PlugIns directory. You can move them all out and verify that you can start Mach3 then move them back in one at a time to see which (if any) is causing the problem. At this moment I have no idea what the error code means and I can't fin't the error codes documented anywhere.

You are right I solved this problem by reloading the Mach 3 software bundle. I somehow messed up the plug in installation and got that error code. I still have no idea what the code is but my machine has been working fine since.