Runtime crash: System.TypeLoadException

Working on porting a game to iOS. When I enter one of the levels, I get the following runtime crash error

"Unhandled Exception: System.TypeLoadException: Could not load type 'BigWallGlass'."

I thought I had been careful about making sure the type was referenced (I have this script attached to something in the title screen - http://pastebin.com/wPpQdGjW , and also searching for BigWallGlass in the built xcode project returns mentions of all of its methods in Assembly-CSharp.dll).

So, any thoughts? I've had a look around online and haven't been able to find any solution to this.

 

Got around it by manually populating a Dictionary<string,Type> and making an equivalent function to Type.GetType. No big deal, but...a bit mysterious a problem.