Solving JPython Applet Problems

If you are having problems getting a JPython applet to run on your browser, you should follow these steps.

1. Make sure that you have a jdk 1.1 compliant browser. At the moment these include:

   Microsoft's Internet Explorer 4.0 and 5.0

   MSIE 4.0 and 5.0 should have no problems running the JPython applets. Most recently, I have tried the latest MSIE 5.0 browser on NT with no troubles. Last update: 5-Oct-1999 baw

   Netscape's Navigator 4.06 or later

   The latest release of Netscape's browser finally comes with acceptable JDK 1.1 support without needing any patches. All I can say is, it's about time!

   Note: It has been reported that the JVM in the Linux release of Navigator 4.06 has serious problems that render it unusable. Similar problems might occur on other Unix platforms. Update 5-Oct-1999: it has been reported that Netscape 4.61 on Linux still has problems.

   I have tried the JPython demo applets with Netscape 4.61 on both Solaris and NT, and both appear to support the JPython demo applets. Last update: 5-Oct-1999 baw

   Sun's Java Activator - not currently enabled

   JPython applets should almost certainly work with the Java Activator, but I haven't yet invested the time to get the demo of this up and running.

   Sun's HotJava

   Unsurprisingly, this browser works extremely well with Java applets, however note that HotJava 3.0 does not support Java 1.1 applets, so it doesn't appear to work with the JPython demo applets. Last update: 5-Oct-1999 baw

2. Make sure you don't have any old releases of JPython in your class path.
   • If you are running a Sun (or Sun-like) VM you need to make sure your CLASSPATH environment variable is not pointing to any directories with JPython .class files.

   • If you are running a MS VM, you should probably check out the registry entry under LOCAL_MACHINE/Software/Microsoft/JavaVM/Classpath

3. Send mail to jpython@python.org explaining your problem. Include the following information:
   • What OS (name and version) and Browser (name and version) you are running.
   • A copy of your Java console window after failing to run an applet. Under IE, you need to explicitly enable the Java console, or Java logging.
   • The URL of the applet that didn't work for you.