try
{
    _excel = new Excel.Application();
    _excel.Visible = false;
    _workbook = _excel.Workbooks.Add( Type.Missing );
    _worksheet = (Excel.Worksheet)_workbook.Sheets[1];
    createColumnHeaders();
    _workbook.SaveCopyAs( savePath );
}
catch (Exception ex)
{
       Logger.Error( "Error creating spreadsheet: {0}", ex.Message );
}
finally
{
    // Cleanup
}

SaveAs( savePath,
        Excel.XlFileFormat.xlWorkbookNormal,
        Type.Missing,
        Type.Missing,
        false,
        false,
        XlSaveAsAccessMode.xlNoChange,
        Type.Missing,
        Type.Missing,
        Type.Missing,
        Type.Missing,
        Type.Missing );

'C://temp/00-04.20.18-24-07-2014/' cannot be accessed. The file may be corrupted,
located on a server that is not responding, or read-only.