I was editing a notebook which contained heavy graphics and often stopped up but always responded after a while. I of course saved at every step to avoid losing work. Unfortunately after running a command it kept completely stuck and Windows forcibly closed it. The surprise came when looking back to it and realizing that now the file (which was more than 50 MB) is 1 KB, so the whole work is completely lost !!! and I just get the following message.
I can't describe how disappointed I feel after losing so many hours of labor in a totally unexpected manner.
Any ideas about a possible retrieval ?
