I have a Windows Forms application which talks to Microsoft Excel via Visual Studio Tools for Office. In this application, having previously set (VSTO) Application.Calculation to XlCalculation.xlCalculationManual without Except, my application then sets Application.Calculation back to XlCalculation.xlCalculationAutomatic. At this point, the application gets a System.Runtime.InteropServices.COMException of 0x800A03EC. Before I can solve this problem, I would at least like to first find out what this error means. It seems to be a generic Excel COM exception. But after much googleing, I haven’t been able to find even a simple description of what the error actually says.
Any advise on how I could proceed?