I just installed the latest version of Mach3 over my existing older version of 3 so I could get at Lcam through Mach. Each time I call the program up,I get an error code(first time it was artcode:9991 and second time was 904,I believe).Then I'm prompted for recovery.If I click 'Yes' it doesn't do anything but blink that warning,if I click 'No' ,it closes Mach3 and then when I retry opening mach3(mill this is) it opens and functions. Whatdaya think?-Keith

Will it open if you click on the EXE in the Mach3 directory

Hrrmmm.....it's opens without error that way.  ? A small,'hidden script' window also shows but no error message. What's that about?-Keith