The shell command
"/srv/www/0003_site/releases/4.1.17-6-dev/filter/tex/mimetex.linux" -e "/srv/www/0003_site/media/media_moodle/filter/tex/7c5c4f4abe5d26fd457c65536b7b8cb8.gif" -- '\Large a_1, a_2'
returned status = 126
Image not found!
Please try the debugging script