# Why I see a warning 'It made by unauthorized application' in AutoCAD when trying to open dwg file created with ODA SDKs?

 1. [FAQ](/faq)
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3. [Regular archives](/faq/regular-archives)

This message indicates that the file was created with a non-Autodesk(c) software. As we are independent from Autodesk(c) this message must appear (with both regular and trial archives) as otherwise it will be a violation of the legal terms.