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[Václav Šmilauer <eudoxos@xxxxxxxx>]

> /home/nhadda/Documents/YADE/lib/yade-unknown/gui/PythonUI_rc.py in
> <module>()
>      11         if not i.isReal: continue
>      12         norm=i.geom['normal']
> ---> 13         angle=atan(norm[ax2]/norm[ax1])
>      14         force=i.phys['normalForce'].Length()
>      15         angles.append(angle)
Where is this code from? Always attach scripts you run. This is obvious
error in the code; you can replace that line with

	angle=atan(norm[ax2]/norm[ax1]) if norm[ax1]!=0 else pi/2