I use 0.48 version of Inkscape, on Windows 8.1, since 1 year (and on other platform for many years).
What a good tool !
Today, I have 1 SVG file impossible to open.

Other SVG files open without problem.
I restarted the pc : same problem.
I tried errazing the preference.xml file : same problem.
I tryed on other computer : this SVG file is still impossible to open, but other ones, yes.
What could I do to open this file? It contains long hours working....
Best regards,
Fabrice