Hi Miki,
It seems that because of some reason the row that is about to be exported does not belong to the exported data grid view control.
The export to any of the file formats is done in a separate thread, thus the application is not frozen. Keep in mind that if during the export you delete, change or add row to the grid this might result in unexpected behavior. What we suggest is to show a progress dialog during the export process to prevent the grid from any changes made by the user. You can create your own progress dialog box and show it on the event ExportStart and close it on ExportEnd event. The other choice you have is to export using our export manager class as described in section 3.5 in the Developers Guide.
Mike, if this does not solve your problem please describe your case in more details and send code sample if possible.
Yours Sincerely,
Support Team