Hello,
My problem is the following :
I have a bag of ZacAction class (which is a mother class for all action classes) :

[Bag(0, Inverse = true, Name = "Actions", Cascade = "save-update", Lazy = CollectionLazy.True, BatchSize = 2000)]
[Key(1, Column = "AlertId", OnDelete = OnDelete.Cascade)]
[OneToMany(2, Class = "CoreDomain.Alerts.Core.ZacAction")]
public virtual IList<ZacAction> Actions { get; set; }

The definition of one of the inheritors is :

[JoinedSubclass(Table = "ConsoleAction", Name = "CoreDomain.Alerts.Core.BuiltInActions.ZacConsoleAction",
Extends = "CoreDomain.Alerts.Core.ZacAction")]
public class ZacConsoleAction : ZacAction
{
[Key(0, Column = "Id", OnDelete = OnDelete.Cascade)]
[Property(1)]
public virtual string Message { get; set; } ...

Until there everything is OK, but if you derive ZacAction in another assembly then try to use the code, you obtain a =>
"instance not of expected entity type"

I tried without NHibernate.Mapping.Attributes, by writing my own xml config file, and the result is the same. I also tried to specify the assemblies everywhere with no better success.
Thx