The shell command<br />"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/d3630d41ef29aa20087be23aed335829.gif" -- '\Large 
  D_{\mathbf{u}}f(a,b) = \mathbf{u} \cdot \nabla f(a,b).
  '<br />returned status = 126<br />
Image not found!<br />Please try the <a href="https://mycourses.aalto.fi/filter/tex/texdebug.php">debugging script</a>