Hi all,

As previously mentioned, I'm working in my spare time to add support for the Maestro code to yt.  I am able to read in the data, make slices of various variables, and save the resulting plots.  I tried, however, to follow the cookbook recipe for volume rendering and I keep getting an error while attempting to ray_cast.

Here is the script I use: http://paste.enzotools.org/show/1470/

and here is the traceback: http://paste.enzotools.org/show/Jn7X2pBPkUD0yhhLwrVv/

I'm not sure if this is an issue with the way I have implemented Maestro support or if there is a bug in the visualization.  Could someone please try my script with their own parameter file to at least verify there is no bug in ray_cast?