# Troubleshooting WEDS Applets

In order for the WEDS applets to work, you will need

- to use a Web browser (such as Netscape 3.0) that supports Java,
- to enable Java in your browser, and
- to not be behind a network firewall.

A quick test to make sure that Applets are working properly for you is to run the Turing machine applet.

## Troubleshooting Your Own Installatin of WEDS

We run WEDS using httpd 1.3 from NCSA on a Solaris 2.5 machine. WEDS requires version 1.3.0 of the Java Developer's Kit to be on your path.

- What version of WEDS did you install? We recommend grabbing the latest version.
- What operating system and version are you using?
- Can you get WEDS to work over the Web when you connect to our site?
- What Web browser and version are you using?
- What Web server and version are you using?
- Does your Web server prevent two-way communication, e.g. to enforce a firewall? If so, then an installation of WEDS may not work.
- What version of the Java Developer's Kit is on your path? You can use `java -version` to find out.
- In which directory have you installed WEDS? It should be installed in the `public_html` directory in your home directory.
- How do you start the WEDS server?
- When you try to run WEDS what exactly happens? You can run the server in debug mode using the following C shell commands on a Unix system:

      cd $HOME/public_html/wetics/classes
      setenv PTARCH `$HOME/public_html/wetics/bin/ptarch`
      java -Denv.C30SIM=../simulator/tms320c30/bin.$PTARCH/c30sim \
           -Denv.MC6811=../simulator/m68hc11/bin.$PTARCH/m68hc11sim \
           -Denv.ADS568=../simulator/ads568/bin.$PTARCH/ads56800 \
           -Denv.SIM568=../simulator/clas568/bin.$PTARCH/sim56800 \
           utexas.espl.weds.server.Server >& Server.out &

- Are there any messages on the Java console?