VBScriptEngine - Use of complex objects as function parameters

[DanielGerlach2]

Certain objects are passed to the script control so that they are available and can be used in scripting.

e.g.
ScriptEngine.AddHostObject("ActSession", HostItemFlags.GlobalMembers + HostItemFlags.DirectAccess, ActiveSession)

ActiveSessio has its own type “Session”.
I can access the hosted object via script code and, among other things, access properties, etc.

e.g.
Sub Main
MsgBox(ActSession.TimeStamd)
...
End Sub

However, if I now use the item as a parameter to call a function, I get the following error:
Class does not support automation.

e.g.
Sub Main
App.Import(ActSession, "Table", "1;2;3;4")
...
End Sub

Definition
Sub Import(ActSession as Session, Table as String, Data as String)

If I change the definition to Sub Import(ActSession as Object, Table as String, Data as String) i got the following error on the first access of the parameter.
ClearScript.HostItem cannot be converted to Session

[ClearScriptLib]

Hello @DanielGerlach2,

We've tried to replicate your scenario based on your description, but we're unable to reproduce any issues. Here's our test program:

Public Class Session
End Class
Public Module App
    Sub Import(ActSession As Session, Table As String, Data As String)
        Console.WriteLine("In Import: '{0}' '{1}' '{2}'", ActSession, Table, Data)
    End Sub
End Module
Module Program
    Sub Main()
        Using ScriptEngine As New VBScriptEngine()
            ScriptEngine.AddHostType(GetType(App))
            ScriptEngine.AddHostObject("ActSession", New Session)
            ScriptEngine.Evaluate("App.Import(ActSession, ""Table"", ""1;2;3;4"")")
        End Using
    End Sub
End Module

Output:

In Import: 'VBTest.Session' 'Table' '1;2;3;4'

We omitted the HostItemFlags because they're unnecessary and have no effect on the test. Beyond that, can you think of anything your code is doing differently?

Thanks!

[DanielGerlach2]

I tried to break the problem down to an example project, but the transfer works correctly there.

I'll try again in the next few days to get it reproducible.