Computer automatically updated W7 OS and now ACAD 2011 keeps turning viewports into polylines and whatever was in the port is gone. Whenever I replace one with new viewport a different one converts to polyline. W7 won't let me restore to a previous point. Any ideas?
Yup. Problem resolved, tho. Somehow the OS update reset the MAXACTVP variable to 16. Why one has anything to do with the other I have no idea. Wonder what else it did.
I'm not sure the OS did that, that's a per-drawing setting my friend
Write down all your favorite/desired variables in a simple SCRIPT file list and run it when you need to get things back to where you want them: this comes in useful more times than not and avoids such time consuming hunts for problems.