Here's the "fixed" version
(at least you can open it in C2) (still uploading on time of post, if it doesn't work right away, try waiting a bit and downloading it later)
Apparently, you have instance variables using the very same name as your object. Also the instance variable's name start with a number (20feet, 40feet).
Strange thing is: to correct, I modified the name of the instance variable in the xml file (changed it to simply "feet") but once opened in C2, the IV name still appears as the original (20feet, 40feet) and has no value anymore.
I suggest you to modify the instance variable name to simply feet, the value allowing you to know what number of feet you're currently in.
This is just a fix so that you can still work with your project, there's something strange going on there anyway, I guess @Ashley will have a look at it at some point.Kyatric2012-01-02 17:36:26