I don't think its wise to make such assumptions!
If Calibre found itself with an empty database suddenly, would it clear out the chosen Calibre eBook directory? Because after the error my library was gone, and unfortunately so were 400 eBooks.
Is there a log file where I can find out the exact error?
Calibre seemed like such fantastic software that I'm actually probably going to try again - the alternative is going through a ton of LIT files by hand. But I'd like to isolate what this problem was, so as to avoid it in the future (and obviously, im going to back up the books which had yet to be imported to Calibre, this time
)