The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/67aebcb839abb679d4c3aed6778d3374.gif" -- '\Large \int \frac{ax+b}{(x-\lambda_1)(x-\lambda_2)}\,\mathrm{d} x.'
returned status = 126
Image not found!
Please try the debugging script