So I have been using 26 a long time, hundreds of files that I use over and over. I upgraded to 27, right before 28 came out. Anyway, no plans to go 28 any time soon. I am, however, starting to use 27 a bit. My problem is that when I open a perfectly good file from 26, in 27, everything looks fine but when you verify the tool assignment, the drills are gone. They are in the cam tree, and I can go thru the feature and it all looks good. Just gone from the tool list. Any ideas?