Having trouble using Autodesk library

[saso_stulac]

Hello.

I am trying to use Autocad's library (Autodesk.AutoCAD.Interop.dll) for conversion from Autocad drawing into an image (.png). When I installed original AutoCAD 2025 I could easily use the library but if I try to use it with the LT version, the code just does not work. Is it possible that only the original Autocad version supports working with Autocad's libraries so that 3rd party programs can use them?

Thank you.

[cadffm]

Hi,

a quick check for offered APIs would explain: LISP is the only API available in LT Version.

F1 Link

>>" Is it possible that only the original Autocad version supports working with Autocad's libraries so that 3rd party programs can use them?"

You can have&use "Lisp libraries" also, but in your case:  Right, AutoCAD (and Toolsets)

[saso_stulac]

Thank you for the answer.

I am new around here, I didn't know about the AutoLISP until now. All I needed was the Autodesk.AutoCAD.Interop.dll library and it seems it doesn't work with the LT version. I was never introduced with any sorts of logical connection between this library and the AutoLISP.

Do you know if AutoLISP can do the job of plotting a .dxf file into an image, using it's library?

Thank you.

[pendean]

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@saso_stulac wrote:

...All I needed was the Autodesk.AutoCAD.Interop.dll library and it seems it doesn't work with the LT version...

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LT versions of AutoCAD are locked from using it by Autodesk: you need a subscription to the more expensive full AutoCAD. There is no backdoor option in LT. Sorry, you are using the incorrect software.

[saso_stulac]

Can anyone recommend a free software or library that would convert .dwg or .dfx files into images?

[pendean · Accepted solution]

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@saso_stulac wrote:

Can anyone recommend a free software or library that would convert .dwg or .dfx files into images?

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If you already have AutoCAD/LT, try PUBLISH command set to a raster image driver saved to a pagesetup.

Or... there are many website based and PC based options you can find with a websearch, help yourself:

https://www.google.com/search?q=dwg+to+png+conversion

https://www.google.com/search?q=dwg+to+jpg+conversion 

https://www.google.com/search?q=dwg+to+bmp+conversion

https://www.google.com/search?q=dwg+to+raster+conversion 

https://www.google.com/search?q=dxf+to+png+conversion
https://www.google.com/search?q=dxf+to+jpg+conversion 
https://www.google.com/search?q=dxf+to+bmp+conversion
https://www.google.com/search?q=dxf+to+raster+conversion 

You can also try the free DWGTRUEVIEW PC-based program from Autodesk too:

https://www.autodesk.com/products/dwg-trueview/overview