Inventor API error "ordinal 345 could not be found in Dt.dll"

[t.karipidis]

Hello, 

I have a software that, among others, creates pack'n'go for each specified order. Till version 2023, it was working fine (it still does on that version). On Inventor 2024 and now also 2025, when it's trying to pack'n'go the generated 3D, it gives me the error:

"The ordinal 345 could not be found in the dynamic link library C:\Program Files\Autodesk\Inventor 2025\Bin\Dt.dll".

Searching about it, I found that this error is similar for other software too, and there is also an unresolved subject for Navisworks in the forum. Also, I have checked any possible solution out there and still nothing.

It's crucial for our process that this gets resolved.

[bradeneuropeArthur]

This file still is in the C:\Program Files\Autodesk\Inventor 2025\Bin\Dt.dll folder, correct?

[t.karipidis]

Hello Arthur, 

Indeed, the DLL is there.