Step 1: load file(s) into preform
Step 2: Generate supports (verify printability is good )
Step 3: Save as .form file
Step 4: Close and reopen Preform
Step 5: load up the same .form file as step 3
Step 6: Printability is now no bueno , even tho supports have not changed and you cannot print.
EDIT: clearing the supports and regenerating will fix this of course…but if I had taken the time to edit the supports (which I normally do) it would be a bummer.
Screenshots from Steps 2 and steps 6 below