Hi
I am getting a error saying "?" for the following line:

Worksheet =(Worksheet)workbook.Worksheets.Add(Type.Missing,
Type.Missing,Type.Missing, Type.Missing);

does any one has an explanation to this, i mean how could an error have
no explaination and just show a "?" on ex.Message (Exception ex)

Please, help me out.. i don't know what to do!

Thanks