I'm a fairly new user since acquiring a 440 and have been successful with a few programs and making chips. However, yesterday I encountered and issue with a program that appears to lock up virtual PP. After uploading the program, I attempted to simulate it and the cursor (gray dot) will move around the screen but has the internal gear spinning to indicate it's thinking. But that's as far as it gets, just sits there in that state, even after I exit PP and reenter it.