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

 1. [FAQ](/faq)
2. »
3. [.dwg support](/faq/dwg-support)

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.