Hi Bruno
Since I reported the edit issue I tried to modify some demos, but I think it's related to the dataset, as you responded at that time...
I don't use Navigation.AppendOnArrowDown since all the append and edit of records is done in a panel, but maybe the problem is still related to a dataset incompatibility...
I'll prepare a demo using MS-SQL Server tables to reproduce the problem.
Best Regards
Francisco Alvarado