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Nullpointer in WWindowPeer

 
Wells Fargo
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Help Please!
I am running applets in JRE 1.4.2 and this wired thing happend once a while. If I switch to other applications (word, SQLServer) and come back to my app, sometimes the applet won't repaint and the plugin console would have the following error:
java.lang.NullpointerException:
at sun.awt.windows.WWindowPeer.displayChanged(WWindowPeer.java: 164)
........
Can anybody shed some light on this issue? Thanks a million!
 
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