The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/3aea19c5d41117caa2b16cacce7088d6.gif" -- '\Large ab =e^{\ln a+\ln b},'
returned status = 126
Image not found!
Please try the debugging script