com error RPC_E_SERVERFAULT from com object or wrapper

I've so far not had to deal with any mucky stuff around using COM with .net

Note I have to use a 3rd part com object which talks to a local NT service.

My simple diagnostics app does this.

using ThirdParty;

class Program{
static void Main(){

CTheCOMObject com = new CTheCOMObject();

// ok
com.Function(arg1);
// not ok

}}

I get this exception [1]. My mains question is could this exception come
from the wrapper or due to some registration problem general to
.net/com/auto generated com wrapper issue OR could is only have com from
the 3rd part com component.

If it is the 3rd party then I can talk to them but at the moment the're
not giving out much :(

The code works on one machine but not on another

adam

[1] Type: System.Runtime.InteropServices.COMException
Message: The server threw an exception. (Exception from HRESULT:
0x80010105 (RPC_E_SERVERFAULT))
Source: Interop.ThirdParty
Stack:    at ThirdParty.CTheCOMObject.Function(String arg)
    at DiagnosticApp.Program.Main()

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