Autodesk.inventor.interop.dll Jun 2026

Autodesk does guarantee binary compatibility of the interop assembly across different Inventor releases. An add-in compiled for Inventor 2022 using the 2022 interop DLL will likely crash or throw MissingMethodException when run on Inventor 2024.

Clean and rebuild the solution. Remove and re-add the reference to autodesk.inventor.interop.dll . Ensure you are not mixing interop DLLs from different Inventor versions. autodesk.inventor.interop.dll

Have you run into strange interop issues with Inventor? Share your experience in the comments below. Autodesk does guarantee binary compatibility of the interop

Ensure your project targets a .NET Framework version compatible with your Inventor version (e.g., Inventor 2025 typically requires .NET 8). Debugging: autodesk.inventor.interop.dll