The shell command"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/226d663c530aab2c0f090b8cb4517c30.gif" -- '\Large b=\frac{\sqrt{D_k}}{a} 'returned status = 126 Image not found!Please try the debugging script