Error: Invalid Filename

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Luca Bulfone

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Jan 4, 2026, 11:34:34 AM (5 days ago) Jan 4
to THERM
Hi,
I'm using Windows 11 and I just reinstalled Therm 7.8.80, but when I try to open a file created in Freecad or Librecad it gives me an error of which I attach the screenshot. The file was saved as dxf by Freecad and as dxf R12 by Librecad. I even installed files
VC_redist.x86.exe 
w_dpcpp_cpp_runtime_p_2023.2.0.49500.exe
after uninstalling the previous version of Therm.
The Filename does not have any period except for the one before dxf. 
Where am I going wrong? 
Thank you
Luca Bulfone

Screenshot 2026-01-04 095934.png

Robin Mitchell

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Jan 5, 2026, 2:00:48 PM (4 days ago) Jan 5
to Luca Bulfone, THERM
Can you provide the DXF file you are trying to import into THERM? 

Robin

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Luca Bulfone

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Jan 7, 2026, 1:17:57 PM (2 days ago) Jan 7
to THERM
Grazie per avermi risposto .
in allegato un file che non riesco ad aprire in Therm, ma che riesco ad aprire ad es. in Autodesk DVGTrueView.

Luca
Pagotto.dxf

Robin Mitchell

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Jan 7, 2026, 1:23:39 PM (2 days ago) Jan 7
to Luca Bulfone, THERM
I am thinking maybe you didn't import the file as an underlay, using the File / Underlay menu option.

When I do that, the underlay is imported without issue.

Although it doesn't appear to autoconvert, which would create polygons. However, you can trace the underlay to create your model.

image.png

Darryl Branton

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Jan 8, 2026, 7:51:49 AM (yesterday) Jan 8
to Luca Bulfone, THERM

Ensure you are using closed polylines if you want the file to auto-convert, and save to the oldest DXF file-type for best results.

 

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Pagotto.dxf

Luca Bulfone

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Jan 8, 2026, 1:52:17 PM (yesterday) Jan 8
to Darryl Branton, THERM
Thank you all. 
Everything's fine now, even auto convert. 
I was doing File/Import instead of File/Underlay.
Luca
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