I think I may have a problem with my design but I wanted to figure out if I could do this. This is a driver routing system, where a driver has a number of stops assigned to him and he then enters information about what happened at that stop (i.e. a deliver was made or not and why not), those stops are stored in a IList as part of the driver. The situation is that there are times where those stops have to be change to different drivers but the history needs to stay the same. I at first thought I could just take the stop add it to the other drivers collection and remove it from the first driver. If I do that though I get

a different object with the same identifier value was already associated with the session: 1554b92f225f4f3592a73680f201abae, of class: TreaterDAL.CompTreatSheet

Am I looking at this from the wrong direction?[/b]

This error occurs when you do a session.Save() on a object that is already in the session. I suppose you do this after you moved the stop to another driver ? As long as you are doing all that in the same session, there's no need for an explicit Save(). Just flush the session or commit the transaction and the changes will be persisted.

If that's not your problem, post your code.