The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/b624651b1e626ddcc5297e3df325fbf1.gif" -- '\Large nF\sqrt{\pi D_{\text{O}}}c_{\text{O}}^b '
returned status = 126
Image not found!
Please try the debugging script