Not sure if it's just the Puppet tool alone as I have used it many times on various layers and sizes within a comp with no problems. Have a character, used the pins on both legs, arms, and various strands of hair - no problem. It's when I try and place a puppet pin on the body of the character, AE crashes and gives me that error message. Used the puppet tool on larger projects before - have more than enough power and memory. It's a PS file, so why would it crash every time I want to place a pin on the body portion only? I've even scrapped the composition, started with the body portion instead of legs, etc and still, it crashes. Any help please!
Same as always: exact system settings, crash info, project settings, source file properties, screenshots, other stuff...
The Puppet Tool crashing could have a milion causes, including something being wrong with your source footage (indeterminate alpha or too thin areas preventing creation of a suitable mesh or similar...)