Miss Nancy,

I'm not familiar with arbaro.jar, but it is probably an application (and not an applet), which is why Applet Launcher won't run it.

Java applets are restricted for "security" reasons. For example, an applet is not allowed to read or write files on your hard disk (otherwise someone could steal or corrupt info that's on your hard disk through a web page by using an applet). On the other hand, a Java application is just like any other application, except that the programmer used Java (instead of C++ or some other language).

Did RTEJava run when double-clicked? I don't have access to a Mac OS X machine at the moment, but last night I did have a chance to briefly test RTEJava.jar on a Mac running Jaguar. On that Mac, double-clicking RTEJava.jar lauched the application.

By the way. if you type the command "java -version" in Terminal, what version number of Java is reported on your Mac?

m