DotNetCoCreateObject fails to load .NET 5 DLLs

[adeel_aziz]

Hi,

I have a DLL originally compiled in .NET Framework 4.7.1 which exposed some classes and methods using COM. I used DotNetCoCreateObject to create an instance and it was working fine.

However, I have recently migrated it to .NET 5 and not the InstallShield fails to load it with following error:

error number: 0x80040707 isrt._dotnetcocreateobject 

dll function call crashed

I am using InstallShield 2019 R3.

Can you please help me with this.

Reagrds,

Adeel Aziz.

[shunt]

Installshield is probably still pointing to the previous .NET version files during your builds. Try specifying the .NET v5 files that Installshield can use during build time:

- Within Installshield select: Tools > ".NET" tab
- Here you can specify the .NET Framework File locations that Installshield should use.

There is more information here:
https://docs.revenera.com/installshield26helplib/helplibrary/IDlgOptions_NET.htm 

[adeel_aziz]

Thanks for the reply. However, The .NET 5 is not installed in "C:\Windows\Microsoft.NET\Framework" location. It is installed in "C:\Program Files\dotnet".

Also, .NET 5 does not seem to have "Regasm.exe". Can you let me know how to handle COM DLLs compiled in .NET 5 in InstallShield?

Regards,

Adeel.

[SimonG]

Did you ever find a fix for this as I have the same problem with .NET dlls having converted from .NET 4.8?

Thanks in advance.