The applet system in question passes data sets from one applet to another via an abstract hub class, which performs processes on each one along the way. It performs superbly in IE, changing the read files as needed and repainting to the desired areas. However, in Netscape 4.7, none of the applets show, although there are indications they have loaded. Using Netscape 6.1, it loads the original data when the file is changed, but fails to do any of the calculations and thus fails to display them. Could someone please enlighten me as to why these problems are arising? http://pubweb.nwu.edu/~eyy830/JavaDev/qrs/qrs.htm if you wish to see the system.