Dear Sir, I'm an undergraduate in University of Colombo Sri Lanka. Currently I'm engaged with my final year project which is based on numeric data set visualisation. I thought of doing this in Java associating Java3D API. Fortunately, while surfing the web I found the Visad package which will very useful to me regarding this matter. Thank you very much for publishing even the source code so generously. I downloaded the source code and compiled it successfully. I encountered an error message while trying to execute the SpreadSheet Application. It gave me the error "Cannot create displays" in a pop up message box. I am working on windows environment (WindowsNT) and I have done everything according to the Readme file. So please be kind enough to send me alternative ways to get rid of this. I will keep in touch throughout my project in erroneous situations. Thanking you, Yours sincerely, S.D Senaratne.