Thomas,

Can you try changing the first line to /path/to/yt/bin/ipython -wthread and see if that works?

Just to be perfectly clear, I meant #!/path/to/yt/bin/ipython -wthread _______________________________________________________ sskory@physics.ucsd.edu o__ Stephen Skory http://physics.ucsd.edu/~sskory/ _.>/ _Graduate Student ________________________________(_)_\(_)_______________