Hello, <BR><BR>I am outputing data to excel sheet using:<BR><BR>Response.ContentType = "application/vnd.ms-excel"<BR><BR>It works fine in classic ASP. But when I use same syntax in ASP.NET, I received "Unable to read file" error message sometimes. I noticed when the row is more than about 50 then the error message show up. I tested that if I only have 20, 30 rows in it then it displays fine. <BR><BR>I would appreciated if anyone has any suggestion regarding to this. <BR><BR>Thanks in advance. <BR><BR>Lisa <BR>