Strange Exception

Hello,

I got this strange exception when calling .SaveChanges(). (running the project from IIS).

When I run from the development server, it throws ExecutionEngineException.

  System.NullReferenceException was unhandled by user code
  Message=Az objektumhivatkozás nincs beállítva semmilyen objektumpéldányra.
  Source=Mindscape.LightSpeed
  StackTrace:
       a következő helyen: Mindscape.LightSpeed.Model.HasOneModel.GetEntityCollection(Entity )
       a következő helyen: Mindscape.LightSpeed.Mapping.EntityChangeSet.(Entity , IEnumerable`1 , LinkedList`1 , Boolean& )
       a következő helyen: Mindscape.LightSpeed.Mapping.EntityChangeSet.SortInsertBucket(TypeModel , List`1 )
       a következő helyen: Mindscape.LightSpeed.Mapping.ChangeSet`1.GetChanges()
       a következő helyen: ..(UnitOfWorkBase , IEnumerable`1 , IEnumerable`1 )
       a következő helyen: Mindscape.LightSpeed.UnitOfWork.SaveChanges(Boolean reset)
       a következő helyen: Mindscape.LightSpeed.UnitOfWorkBase.SaveChanges()

It is LightSpeed 3.1

This looks like you have an EntityHolder (to-one side of an association) which is not initialised e.g.

private readonly EntityHolder<Customer> _customer;  // wrong

instead of

private readonly EntityHolder<Customer> _customer = new EntityHolder<Customer>();

This should not happen in designer code, but could happen by mistake if you are hand-writing your entities.

If that's not it, could you verify that the error still occurs in the latest LightSpeed 4 nightly build, and if so provide us with a minimal repro (console application or NUnit test with only the minimal set of entity classes required to exhibit the error) please? Thanks!