"Unexpected File Format" message

Hello,

I’m a beginner in SketchUp and need help. When i want to open my file its just like ‘Unexpected file format’. I don’t know what to do. Someone can help me? I need this by this week.

LB2270.skp (13.4 MB)

The contents of the file look ok, but I can’t recover anything from it. I’ve asked a developer to take a look. Because we’re in Colorado, and it’s Sunday evening, I’m not expecting him to look at my message for another 12 hours.

So, I was wrong by 12 hours. Here is what the developer managed to recover.

LB2270 Imperial Hotel Room (recovered).skp (4.1 MB)

Alright. only misiing some material. but its okay at least i still have layout plan. thank you @colin