I'm still getting the error message.
Seeing your an expert on the matter ... thought I'd just correct you on your last post ...
The grid does support LinQ - Inserting, Updating and Deleting.
The above error message was caused by the grids incomatibility with Microsoft AJAX Update pannel.
As soon as the grid is taken out of an Update pannel ... it works fine, but any triggers within the Update pannel have no effect on the grid if it is not within the same update context.
Cutting the post short - the Grid has a long way to go.
My work around involved NESTING UPDATE PANNELS.
So in a scenario where there are multiple auto postback triggers for a form... the Aspose grid will need to have it's own Update Pannel with all settings on default.