Run the testcase TestDebug located in the attachments using JDK1.3 and
 JDK1.3.0_02 on Windows NT and the following exception will be thrown:

java.lang.NullPointerException
        at javax.swing.text.PlainView.modelToView(PlainView.java:310)
        at javax.swing.plaf.basic.BasicTextUI$RootView.modelToView(BasicTextUI.j
ava:1245)
        at javax.swing.plaf.basic.BasicTextUI.modelToView(BasicTextUI.java:818)
        at javax.swing.plaf.basic.BasicTextUI.modelToView(BasicTextUI.java:793)
        at javax.swing.text.JTextComponent.modelToView(JTextComponent.java:1216)

        at javax.swing.text.DefaultCaret.setVisible(DefaultCaret.java:611)
        at com.telcordia.wfa.debug.DebugConsole.<init>(DebugConsole.java:201)
        at com.telcordia.wfa.debug.Debug.initiate(Debug.java:145)
        at TestDebug.run(TestDebug.java:29)
        at java.lang.Thread.run(Thread.java:484)

 This same testcase launches all the time and displays a GUI with logged
 exceptions using jdk1.2.2. On rare occassions though using 1.3 the
 testcase does run properly even after subsequence tries.

 In the attachments is 1.3run.txt that has the full verbose output of a success
 launch while ExceptionMessage.txt contains almost the same output with the
 exception.

 The offending call _consoleDisplay.getCaret().setVisible( true ) is in
 DebugConsole.java under the com directory that comes with the testcase.
 It's of type JTextArea. If you comment out the call everything works.