Thanks a lot "vortse_a", I'm replying to your answer because I have the same problem. I have tried your suggestion, and it works.
Only, I would like that the figure, the .fig file, when double clicked, just simply be displayed in MATLAB without the need of issuing any command to activate visibility. As it works now, the .fig file, when doble clicked, produces no display.
So the final question, at least from my side, is: is it possible, in a batch program, to save a few figures without interacting with the screen at all? And the saved figures should be .fig (with graphics files, all is ok, for example .png works fine).