Check this thread: <a href="http://salilab.org/archives/modeller_usage/2009/msg00281.html">http://salilab.org/archives/modeller_usage/2009/msg00281.html</a><br><br>It means that you have to define your MyModel class OUTSIDE the main script and then import it.<br>

<br>Just open a new script, call it MyModel.py, paste the class MyModel inside. Don&#39;t forget to add the necessary imports at the top. Then in your main modelling script just add &quot;from MyModel import MyModel&quot; in the beginning. That should do the trick.<br>

<br>Regards,<br><br clear="all">João [...] Rodrigues<br>@ <a href="http://stanford.edu/~joaor/">http://stanford.edu/~joaor/</a><br>