The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/58891393fb3e878c894663d30103ce2a.gif" -- '\Large \frac{m}{2}b^2 - \frac{m}{2}a^2'
returned status = 126
Image not found!
Please try the debugging script