The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/4b4f84cef64e1a276d76872ed05be3e9.gif" -- '\Large \nabla \cdot\vec{v} =0 '
returned status = 126
Image not found!
Please try the debugging script