Home/ Questions/Q 8347073
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-09T07:14:29+00:00

I’m generating interop assemblies using TlbImp . Several of my type libraries reference a

  • 0

I’m generating interop assemblies using TlbImp. Several of my type libraries reference a single core type library.

When I run TlbImp against First.dll I get Interop.First.dll and Interop.Core.dll. The problem is that when I run it again, against Second.dll, TlbImp tries to generate Interop.Core.dll again, resulting in the error:

TlbImp : error TI0000 : System.ApplicationException - The assembly for referenced
type library, 'Core', will not be imported since it would overwrite existing file
'Core.dll'.

How can I tell TlbImp not to generate interops for referenced assemblies?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I needed to use the /reference parameter to explicitly identify existing interop assemblies.

    Originally I was running these commands:

    > tlbimp Core.dll /out:Interop.Core.dll
> tlbimp First.dll /out:Interop.First.dll
> tlbimp Second.dll /out:Interop.Second.dll

    TlbImp would try to import the referenced Core.dll and create an interop at Core.dll in the second and third commands, triggering an error.

    To fix this, I just needed to explicitly specify the Core interop:

    > tlbimp Core.dll /out:Interop.Core.dll
> tlbimp First.dll /reference:Interop.Core.dll /out:Interop.First.dll
> tlbimp Second.dll /reference:Interop.Core.dll /out:Interop.Second.dll
    • 0