i have the neat video plug-in on a lot of clips and several time it has tried to acess memory and could not creating a never ending supply of error messages. Had to alt ctrl del Vegas to get it to cut off... It must be a memory issue... I will try some stuff and kyp..
Neat Video often behaved like that before - it seemed that one could only use it a limited number of times in one project - but after having updated to the last version I have not seen the problem for a long time.