PLSQL Clob Document,showing Numeric or value error in the Notification

I'm Using PLSQL CLob Document for printing data in HTML table format in the Notification,even clob variable is capable of storing data up to 4gb ,when i'm trying to print the data greater than 32767bytes (32kb) it is throwing error "Numeric or value Error" .Please help me out to print data >32kb in the notification.Appreciated for the Solution.