The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/f089b179d336237db4e2be140004e3bb.gif" -- '\Large
\mathbf{f}(x,y,z)=(x^2+y^2+z^2-3)\mathbf{i} + (x^2+y^2-z-1)\mathbf{j} +(x+y+z-3)\mathbf{k}.
'
returned status = 126
Image not found!
Please try the debugging script