actually it opened fine for me in graphtec pro studio - file is huge.
Did the simple file I posted cut ok or did it have problems with that? trying to figure out if we are tracking down a hardware issue with the carriage like some stated above with possible crack in carriage arm, memory overload because of the huge file , blade holder issue, if your blade holder retainer has two holes like most mh series is the holder in the back hole, we need to eliminate things to have a better idea as support is now closed till monday - a systematical troubleshooting is our best bet this weekend