Some time ago I had a bunch of brains working with mach3. At the time I was using a Pokeys57E with shared data etc.

For the moment I have all those old brains disabled, and I'm simply trying to run one very simple brain....

Output 1    NOP    Delay    Output 1

The moment I click on the enable checkbox for this brain, Mach3 crashes with an Artcode 9991 error.

I tried uninstalling Mach and then reinstalling, the Pokeys57E add-on is presently NOT enabled. I have no idea what's causing the crash?

Resolved.....RTFM

When I reinstalled I worked from memory instead the instructions and forgot to reboot. At least I think that was it, it's not happening anymore.