InternalError: couldn't create component peer - AWT Applet refresh

Hi,

I've got the simplest of Mickey-Mouse AWT dialogue boxes created from an
Applet that is now returning the following error when I refresh the page
(i.e. first time through everything is peachy): -

java.lang.InternalError: couldn't create component peer
 at sun.awt.windows.WComponentPeer.checkCreation(Unknown Source)
 at sun.awt.windows.WComponentPeer.<init>(Unknown Source)
 at sun.awt.windows.WCanvasPeer.<init>(Unknown Source)
 at sun.awt.windows.WPanelPeer.<init>(Unknown Source)
 at sun.awt.windows.WWindowPeer.<init>(Unknown Source)
 at sun.awt.windows.WFramePeer.<init>(Unknown Source)
 at sun.awt.windows.WEmbeddedFramePeer.<init>(Unknown Source)
 at sun.awt.windows.WToolkit.createEmbeddedFrame(Unknown Source)
 at sun.awt.windows.WEmbeddedFrame.addNotify(Unknown Source)
 at java.awt.Window.pack(Unknown Source)
 at tier3Client.Tier3Logon.<init>(Tier3Logon.java:67)
 at tier3Client.Tier3Session$Connection.open(Tier3Session.java:352)
 at tier3Client.Tier3Session.checkIn(Tier3Session.java:680)
 at tier3Client.Tier3Application.init(Tier3Application.java:96)
 at sun.applet.AppletPanel.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)

As you can see below the triggering code is a simple "pack": -

package tier3Client;

import java.awt.*;
import java.awt.event.*;

import tier3Client.Tier3ClientException;

final class Tier3Logon extends Dialog
                       implements ActionListener
{
    Label headr = new Label("Server Authentication Required"
                                       , Label.LEFT);
    Label user = new Label("Username:", Label.RIGHT);
    Label pass = new Label("Password:", Label.RIGHT);

    TextField inUser = new TextField(40);
    TextField inPass = new TextField(40);

    Button okay = new Button("OK");
    Button cncl = new Button("Cancel");

    Checkbox cb = new Checkbox("Display logon confirmation",true);

    boolean logonAborted = false;

    protected Tier3Logon(Frame dFrame)
    {
        super(dFrame,"Tier3 Logon",true);

        setBackground(Color.white);

        headr.setFont(new Font("Helvetica", Font.BOLD, 14));

        inPass.setEchoChar('*');

        Panel top = new Panel();
        top.setLayout(new GridLayout(1, 2, 8, 2));
        top.add(headr);
        top.add(cb);
        add("North", top);

        Panel pc = new Panel();
        pc.setLayout(new GridLayout(2, 2, 8, 2));
        pc.add(user);
        pc.add(inUser);
        pc.add(pass);
        pc.add(inPass);
        add("Center", pc);

        okay.addActionListener(this);
        cncl.addActionListener(this);

        Panel pb = new Panel();
        pb.add(okay);
        pb.add(cncl);
        add("South", pb);

        setBounds(200, 210, 300, 300);
        pack();
        setResizable(false);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent ae)
    {
        if (ae.getSource() == cncl)
            logonAborted = true;

        setVisible(false);
    }
}

I have the same code working/refreshable elsewhere and the only differences
that stand out are that in that case it's all done from the Applet's init()
method, and in this case Tier3Logon forms part of a static class variable.

For the working example see: -
http://manson.vistech.net/t3$examples/demo_client_flex.html
Username: TIER3_DEMO
Password: QUEUE

Anything a bit more helpful than "InternalError"?

Cheers Richard Maher

BTW. I"ve juggled things around a bit and the error still occurs but is now
on the setVisible(true) method.

PS. I understand AWT is not the sexiest or most modern toolkit on the planet
but I'd appreciate it if we could stick with it for the sake of the example.