The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/2763f1943a14e397d9dcf1ab5692c2fe.gif" -- '\Large \mathbf{r}(t)=(e^{-t},e^{-t})'
returned status = 126
Image not found!
Please try the debugging script