The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/0a1b7afda8eb7763d39645e68241185a.gif" -- '\Large
\mathbf{r}(t)=\left(u(t),v(t)\right)
'
returned status = 126
Image not found!
Please try the debugging script