#72 Generate gravure from dxf error

[Ed Cramer]

I created a DXF model using SolveSpace and tried to generate some toolpaths using PyCAM. I added some cutters and created two engraving processes. When I tried to export the toolpaths, I received this error dialog:

An unexpected exception occoured: please send the text below to the developers of PyCAM. Thanks a lot!
Traceback (most recent call last):
File \"C:\\Python25\\lib\\site-packages\\pycam\\Gui\\Project.py\", line 4041, in generate_toolpath
self.model, toolpath_settings, callback=draw_callback)
File \"C:\\Python25\\lib\\site-packages\\pycam\\Toolpath\\Generator.py\", line 62, in generate_toolpath_from_settings
backend, callback)
File \"C:\\Python25\\lib\\site-packages\\pycam\\Toolpath\\Generator.py\", line 226, in generate_toolpath
callback=callback)
File \"C:\\Python25\\lib\\site-packages\\pycam\\Geometry\\Model.py\", line 683, in get_offset_model
new_groups = group.get_offset_polygons(offset, callback=callback)
File \"C:\\Python25\\lib\\site-packages\\pycam\\Geometry\\Polygon.py\", line 957, in get_offset_polygons
points.append(get_shifted_vertex(index, offset))
File \"C:\\Python25\\lib\\site-packages\\pycam\\Geometry\\Polygon.py\", line 854, in get_shifted_vertex
factor = cross_offset.dot(bisector_normalized)
AttributeError: \'NoneType\' object has no attribute \'dot\'

System Info:
Windows XP SP3
Athlon 64x2
2GB

DXF generated with SolveSpace - http://solvespace.com/
PyCAM 0.5.1 and associated libraries downloaded and installed Jan 11, 2013

DXF file, PyCAM config, and screenshot attached to this post

[Ed Cramer]

DXF file and PyCAM config

[Nobody/Anonymous]

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