Okay, this has happened TWICE. Randomly my project files will just stop working and I'll get a message that says "Unexpected file format". What I just did last time was make a new project file and then move all the files into that, but it won't work this time. I get a message that says "Failed to load common event data."

This is REALLY pissing me off and it getting me worried that I'm gonna loose all my files. Does anyone know what's going on?

This happened to me last time, somehow i corrupted my project data.

The way i fixed it was do a checkdisk, and attempt to repair any bad sectors.

My Computer > Right Click on the local Hard Drive > Properties > Tools > Check Now..

Tick both of the checkboxes that appear in the new window. then click start. You might have to restart and wait awhile untill its all fixed (the time depends on the size of your hardrive, so i advise you to find something to do for a few hours)

Well, I have an external hard drive that I save all of my stuff on.

I had to use one of the backups that I made, thus undoing the past couple days of work. But I didn't loose too much.

What I really want to know is WHY this happens so that I can avoid it...

Well, it happened to be becuase i kept taking my Hard drive back and forth from my mates laptop to my comp, and college. Somehow between those trips the data was corrupted, either removing the hard drive before the data has been fully transfered or turning the computer of by holding down the power button whilst the hard drive is still in use.

Hmm, yeah that does make sense. I guess I'll stop stop turning my external hard drive on and off constantly then. But I'll also be sure to make a back-up as much as possible, just in case.

Anyways, thanks. If you or anyone else has any other ideas though, that'd be great.

I dunno if my case was just a lucky break, but sometimes you can get it back by starting a new project, and moving the data files to the new project.

I did that to see if it would work, and sunuvagun, it did!

Yeah that's what I did the first time and it worked fine, but the second time it failed to work.