The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/141139ef6c5dbae626d9c260136555ea.gif" -- '\Large \varepsilon:=\frac{1}{3}|a-b|.'
returned status = 126
Image not found!
Please try the debugging script