I found the mastercam post processor and overall things are working much better with code MasterCAM puts out but on some files it will start to do my tool change, it will go to the correct X,Y position for the tool change, then I hit cycle start, it will go to the correct X,Y position for the fixed tool check plate and start to descend but a second later will stop descending with t ding sounding from Mach3 and sit there showing Probing for Z Zero... but nothing happens until I hit either stop, at which point it will flash "Error on line 147 - Application defined or object defined (and then I can't see the rest of the error)" or if I hit Cycle start again it will start descending but will try and push through to the center of the earth.
It will do this with some of the cut files I create but not others but they are all created using the same settings in the post processor file; at least I think so.
Any ideas?