Hello,

Crashlytics is recording a crash that occurred several times with at least one of our customers: when setting the "data" object of our IGGridViewDataSourceHelper object the following exception is thrown: "Objective-C exception thrown.  Name: NSInvalidArgumentException Reason: *** setObjectForKey: key cannot be nil "

I found this post: "monotouch: IGGridView.UpdateData() with custom header cell gives error" but we are not overriding any of the CreateCell-methods.

The problem is that we are unable to reproduce the bug on our development system. Here's the piece of code that seems to be causing the crashs:

                    dataSource.Data = _hpAktivitaeten.ToArray();
                    gridView.WeakDataSource = dataSource;
                    gridView.UpdateData();

DataSource is derived from IGGridViewDataSourceHelper with overrides for "ApplyFilter" and "ResizeColumn". _hpAktivitaeten is a list of our data objects.

What can cause this kind of exception? Any help would be appreciated!

Thanks in advance

Andreas