The shell command
"/lrn-mdl-prod/build/75217/filter/tex/mimetex.linux" -e "/lrn-mdl-prod/moodledata/filter/tex/f6974665eb81a93a8e5d5e7dcc7be0b7.gif" -- '\Large j-b'
returned status = 1
Image not found!
Please try the debugging script