The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/aa83bd08e5256beab12f898b1fe82ca9.gif" -- '\Large f(x_k)>y-\frac{1}{k}'
returned status = 126
Image not found!
Please try the debugging script