Help Message: Trying to get property of non-object!!!!

This sounds like a classic Widows vs Linux case sensitivity issue, especially given your filename "controllers/statup.php". CI looks for controllers/Statup.php, and wil find it on Windows but not on Linux.
You said that are running the same OS on both servers, leading me to surmise that one is configured to enforce case sensitivity and the other not.

The other thing you might look for is different environment config folders, eg application/config/production