So, I just released schain 2.0.4... please update now, because, well,
2.0.3 will be remembered as the worst schain release ever. It suffered
from a very nasty bug that prevented it from opening any file. This is
what happens when you release software a bit too hastely. Sorry for the
inconveniences... :( I promise this one does work...
* Bugfix: Fixed critical bug that prevented schain from opening any