The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/1b55edb8e9e56a9c7b4b4d5dc4acc1f1.gif" -- '\Large \approx 13.7'
returned status = 126
Image not found!
Please try the debugging script