Operating system?
be saved every 30 second
not that great, i would use 2 or 5 min.
my file is not of a size 0, however when i open it, it's empty
where do open the file? Is it a project file or a source file?
What if you open the file in a text editor?
What was the cause of this? Sudden shutdown? Crash?
so i have a file.saved with the same name as my project
make a copy of both files and rename the .saved to .cbp and try to open it
Use a cvs like git next time you make a important project and commit your work regularly