I don't recall exactly what I was doing at the time. I was editing the global filters and switching between two running instances of SimPE. I think the BHAV Group Filter box may have had input focus when I switched away to another instance of the app.

************** Exception Text **************
System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Parameter name: '5' is not a valid value for 'displayIndex'.
at System.Windows.Forms.ListViewItemCollection.get_Item(Int32 displayIndex)
at System.Windows.Forms.ListView.LvnBeginDrag(MouseButtons buttons, NMLISTVIEW nmlv)
at System.Windows.Forms.ListView.WmReflectNotify(Message& m)
at System.Windows.Forms.ListView.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

EDIT: Oh yeah, this was the 3/26 build (0.33 I believe)

I know what I did now, I changed the Group Filter while a previous filter was still being applied.

I had inadvertantly selected the Globals filter, and while that was processing I started typing something else in, and the exception occurred. I was able to Continue without incident.