Unfortunately I don't know for sure what the problem is.
Running the command 'whatIs findStartUpCamera' in Maya reveals the following:
// Result: Mel procedure found in: [path]/maya/2012-sp1/scripts/startup/findStartUpCamera.mel
The [path] part is specific to my system here; it will be different for you. But anyway, it looks like that file is damaged or missing for you. Navigate to your scripts/startup folder and see what you can see. If the file is missing, you could search your computer for it and try to replace it... if it's there, it might be corrupt, I guess? In either case, a reinstall of Maya might be your best bet.
All of this is just a wild guess, really... not sure if the problem is actually somewhere else. But it's what I'd start with.