The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/9a6e8d16f467f4d24d1bf47b58cee962.gif" -- '\Large \frac{1}{1-x^2}'
returned status = 126
Image not found!
Please try the debugging script