Openning form prints exception and then IDE freezes.

-- System info ----------------------------------------------------------------
  Product Version    = NetBeans Developer (Gandalf), Build 316
  Operating System   = Windows NT Version 4.0 Running on x86
  Java VM Version    = 1.2.1
  Java Vendor        = Sun Microsystems Inc.
  Java Vendor URL    = http://java.sun.com/
  Java Home          = n:/jdk1.2/jre
  Java Class Version = 46.0
  JIT                = Symantec, version 3.10.100(x) for JDK 1.2
  Home Dir           = C:/WINNT/Profiles/mbalin
  Current Directory  = N:/netbeans/316
  NetBeans Home      = .

  NetBeans User Home = .
  System Directory   = ./system
  CLASSPATH          = ./lib;./lib/developer.zip;./lib/icebrowserlitebean.jar;./
lib/infobus.jar;./lib/xml.jar;./lib/servlet.jar;./lib/regexp.jar;n:/jdk1.2/jre/l
ib/i18n.jar;n:/jdk1.2/lib/tools.jar;n:/jdk1.2/lib/dt.jar
-------------------------------------------------------------------------------
...
java.lang.Exception: Stack trace
        at java.lang.Thread.dumpStack(Thread.java:983)
        at com.netbeans.developer.modules.loaders.form.JavaCodeGenerator.initial
ize(JavaCodeGenerator.java:60)
        at com.netbeans.developer.modules.loaders.form.FormManager.getCodeGenera
tor(FormManager.java:134)
        at com.netbeans.developer.modules.loaders.form.FormManager.initialize(Fo
rmManager.java:65)
        at com.netbeans.developer.modules.loaders.form.FormEditorSupport.loadFor
m(FormEditorSupport.java:144)
        at com.netbeans.developer.modules.loaders.form.FormEditorSupport.open(Fo
rmEditorSupport.java:69)
        at com.netbeans.ide.actions.OpenAction$1.run(Compiled Code)
        at com.netbeans.ide.util.Task.run(Compiled Code)
        at com.netbeans.ide.util.RequestProcessor$ProcessorThread.run(Compiled C
ode)


Full thread dump Classic VM (JDK-1.2.1-A, native threads):
    "Thread-1" (TID:0x25c75d8, sys_thread_t:0xbddfa0, state:CW, native ID:0x58)
prio=5