Installed Version 398t, added my existing project, & been working OK but occasionally when debugging it crashes I shows a DF1 error:
This happens on different pages as soon as I click a Pushbutton or click enabled Pilot Light, but not every time , and doesn't replicate on the same button later. Have to Stop debugging then Start again & this time the same object that crashed before works, but later a different object will give the same error, maybe.