Need help with dxf generation

[jeroend]

I'm building my website / application where users can upload and/or customize existing drawings to fit their own needs and dimensions. It all worked with SVG, but now I'm working on a DXF export, so I can send drawings to cnc routers. I do have one program (viacad) which is showing my dxf drawings correctly. However I did send a few of my drawings to a cnc / carpenter shop who could not read my generated (attached boomerang.dxf) file with autocad 2010 ( internal error: !dbr12dxfin.cpp@2318 ) after which autocad crashed and tried to send a report to autodesk. I'd really appreciate if somebody could give me hints on what's wrong. You can experiment yourself with my online dxf generation tool select DXF (You need a modern non IE browser, firefox v10 or chrome v16 are just fine) and provide feedback on the generated dxf.

[ger21]

I can't get it to generate a .dxf file. I want to make something simple to compare to a good .dxf.

[Al_The_Man]

AutoCad also show a DXF file error if trying to load the DXF file, however DXF to DWG convertor works OK and it displays as a DWG drawing OK?.
Al.

[jeroend]

I went back to the original python package (dxfwrite), from which I basically borrowed the logic. DXFwrite is supposed to generate R12 DXF.
Attached 2 files which come directly from dxf write.

[Al_The_Man]

At least AutoCad opens these OK.
Al.

[jeroend]

Thanks, so DXFWrite was okay and i skinned its output too much. I'll proceed to incorporate this in my generation tool.
Thanks again