I am getting HRESULT: 0x800A03EC on Worksheet.range method. Number of rows are more than 70K. Office 2007.
Code:
Microsoft.Office.Interop.Excel.Range
Seems like this i s a pretty generic error for "something went wrong" with the operation you attempted. I have observed that will also occur if you have a formula error and are assigning that formula into a cell. E.g. "=fubar()"