thank you for the file, thought I'm not excatly sure what it does.
I thought that i would try to experiment with it and set up a figure, I then created a new dolly camera and  attached it to my figures head using the point to option.
I set up 120 frames and created my end frame and placed one halfway through then played the timeline.
worked OK 
I then tried the script.
Went back to frame 1 with both the figure and the camera selected , and hit the go button.
I replayed my animation and now the camera only moves at the very last frame...
I take it I did something wrong as usual :)