The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/12999810d5210ea15f2ba7a1b6b63015.gif" -- '\Large \displaystyle C_d/C_0=2\cosh(\varphi_0) '
returned status = 126
Image not found!
Please try the debugging script