We are testing the OPC .NET API 2.0 Client with a TAC/inet opc da server.

Here is the address...
opcda://localhost/TAC.OPC.Server.I/Net/{116d9772-7caf-11d5-9766-0040c78558ca}

As you can see, the name of the server has a / in the name (I/Net).

This is causing a parse issue in OpcCom.Factory.cs, in the Connect method.
It should be changed from IndexOf to LastIndexOf....

public static object Connect(Opc.URL url, Opc.ConnectData connectData)
string progID = url.Path;
string clsid = null;

int index = url.Path.IndexOf('/');

if (index >= 0)
{
progID = url.Path.Substring(0, index);
clsid = url.Path.Substring(index+1);
}