>I'm writing data out to an Excel file. When I save I get "Exception from HRESULT: 0x800A03EC" on the save line below
>
>

>oSheet.SaveAs(ExportParams.sResultFileName, 
>                            Excel.XlFileFormat.xlWorkbookNormal,"", "",false, false, false, null,null);
>

>
>The params appear to be correct according to the object browser and this http://msdn.microsoft.com/en-us/library/microsoft.office.tools.excel.worksheet.saveas(VS.80).aspx
>
>I could use some help.


This worked:

oSheet.SaveAs(ExportParams.sResultFileName,
        Type.Missing,
        Type.Missing,
        Type.Missing,
        Type.Missing,
        Type.Missing,
        Type.Missing,
        Type.Missing,
        Type.Missing);