I keep trying to convert a bunch of jpg files into pdf, but ImageMagick just seems to keep failing there.
Well well, after three thousand fix and reinstall attempts (seriously, I've been trying to fix it for the last month or so), this is what I'm getting today:

Code:
convert: no decode delegate for this image format `IMG_9.jpg' @ error/constitute.c/ReadImage/532.
convert: missing an image filename `back.pdf' @ error/convert.c/ConvertImageCommand/2949.
As it seems there's no other way to do this save for this program, and I need it badly, any ideas?