Forum Thread: I ran out of all assumptions.

I've been working on a project in Project 15.0 for more than a month. And now, perhaps because of a system crash, I can not open the file with my work and send it to the boss. The program tells me about the error - Project can not recognize this file format. Do you want to open this file as text only? I tried to open the desired file from another PC, but the result is the same. What can be done with this? I ran out of all assumptions.