In standalone apps, call CoInitialize (implicitly via new Application() or System.Windows.Forms.Application.Run ) before accessing Inventor.
Developers writing automated regression tests for Inventor features use this DLL to programmatically open files, perform operations, and validate results. autodesk.inventor.interop.dll
Check binding and dependencies
Application inventorApp = null; try
Some COM methods overload into obscure _Variable or Object parameters. For example, Add methods often accept object for ReferenceKey , requiring you to pass Type.Missing or null just to skip an optional parameter. The error messages when you get this wrong are terrible: “Exception from HRESULT: 0x8002000B (DISP_E_BADPARAMCOUNT)” . In standalone apps, call CoInitialize (implicitly via new
Always set Copy Local = False for autodesk.inventor.interop.dll . For example, Add methods often accept object for
: While "Embed Interop Types" helps, major API changes between Inventor versions can occasionally break code. Always test your scripts against the specific Inventor release version you are targeting.