Hi Bobben,

If I'm reading this correct, you have something like this:

[Transaction(TransactionOption.Required)]
public class A : ServicedComponent
{
   [AutoComplete]
   void Execute() {
       SubExecute();
   }

   protected virtual SubExecute() { }
}

[Transaction(TransactionOption.Required)]
public class B : A {
   [AutoComplete]
   void SubExecute() {
       // do work
   }
}

In this case, if you create an instance of class B and call Execute, I think
that will happen is this:

1. Base class A's Execute will be called. Since TransactionOption.Required
is specified, a transaction will be created.
2. B.SubExecute will be called. Since there is already a transaction, it
will be used for the execution of SubExecute
3. Upon returning from B.SubExecute, AutoComplete will commit the
transaction.
4. Returning from A.Execute will also try to commit the transaction,
yielding the error you are seeing.

Also, if you remove the inheritance from ServicedComponent, I don't think a
transaction will actually get created in the background through COM+.

HTH,
Mark Jen [MSFT]