The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/bf9ed1964f3efdc8ad5e18d9517cedd9.gif" -- '\Large
f(x)=\frac{1}{1-x} = 1+x+x^2+x^3+x^4+\dots
'
returned status = 126
Image not found!
Please try the debugging script