# Blender 2.68 (sub 0), Revision: 58536
bpy.context.scene.use_nodes = True  # Property

# backtrace
0   blender                             0x0000000100138884 blender_crash_handler_backtrace + 70
1   blender                             0x0000000100138abb blender_crash_handler + 451
2   libsystem_c.dylib                   0x00007fff8de9190a _sigtramp + 26
3   libsystem_c.dylib                   0x00007fff8deb0008 _asl_auxiliary + 369