DotNetCoCreatedObject crash problem

[Mystique]

I have a InstallScript MSI project. I am trying to call a manged dll function from InstallScript project using DotNetCoCreateObject. But when the code is run during installation, I got this error:

Error Number: 0x80040707
Description: Dll function call crashed: ISRT.DotNetCoCreateObject

Does anybody know the reason of this problem? Thanks for any help.

[joshstechnij]

Can you provide any additional information about how you are calling DotNetCoCreateObject? Does this happen with any project you try this code in? Can this issue be reproduced with a sample .NET assembly?

[Mystique]

I created a very simple dll called MyDll and here is the code.

dllPath = SUPPORTDIR ^ "MyDll.dll";
svReturn = UseDLL(dllPath);

if( svReturn = 0) then
set myObj = DotNetCoCreateObject(dllPath, "MyDll.Class1", "");
endif;
UnUseDLL(dllPath);

It crashed on set myObj line with the following error:
Error Number: 0x8004070
Description: Dll function call crashed: ISRT._DotNetCoCreateObject

Setup will now terminate.

--------------------------------------------------

Thanks for your help.

[Roman1]

Hi,
Please put the dll whole project as zip, too.

[Mystique]

Thanks for your help.

[RobertDickau]

(It probably doesn't have a bearing on the issue, but you don't need UseDLL or UnUseDLL for a .NET assembly; that pair is for C-callable DLLs.)

[joshstechnij]

The class in the attached sample DLL needs to be marked as ComVisible.

[Mystique]

That worked. Thank you (both) for your help.

[Gvarma]

joshstechnij wrote:
The class in the attached sample DLL needs to be marked as ComVisible.

Hi,

I have the same issue here, though in my case DLL was working fine unless I changed Target Framework to 3.5 sp1 and i started getting this error, now I have revereted it back to .NET 2.0 but i am still getting the same error...

I have MSI Installscript project.

Any sugessations?

[joshstechnij]

You may try using a utility such as .NET Reflector to ensure the assembly or class you are trying to use in InstallScript is still marked as ComVisible.

[pankaj_kumar]

Mystique wrote:
I have a InstallScript MSI project. I am trying to call a manged dll function from InstallScript project using DotNetCoCreateObject. But when the code is run during installation, I got this error:

Error Number: 0x80040707
Description: Dll function call crashed: ISRT.DotNetCoCreateObject

Does anybody know the reason of this problem? Thanks for any help.

Just install .net framework 4.5 through GUI itself.issue will be solved. Hope it will