I think my work file is corrupted but I still can open it. I cannot see the 3d view and if I export it to pdf it just throws an error. This file is really important to me and it will be a waste of time for me if i cannot recover it. I dont know if the programs automatically makes a backup over the time or if the main file has it. If anyone knows hot to recover a backup or even repare it...

This is the file: https://drive.google.com/open?id=0BxknF ... JIV2tTb0tv