Re: GUI doesn't appear in rare cases

["Ed Jenkins" <digitalman2000hm@hotmail.com>]

Two possibilities that come to mind are differences in video cards or 
differences in pixel depth settings, but this may not be the case in your 
situation.  Since JDK 1.2 or 1.3, I think 16-colour mode is no longer 
supported, but hopefully you are not trying to use that anyway.

Also look for diferences in Windows service packs, especially where DirectX 
or video drivers are concerned.  Some Java apps are not compatable with 
certain versions of DirectX.  The Bug Parade at java.sun.com lists some 
workarounds for this.

Ed

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From: Ralph <titojermaine@yahoo.com>
To: ajug-members@ajug.org
Subject: GUI doesn't appear in rare cases
Date: Tue, 9 Jul 2002 13:39:12 -0700 (PDT)

We have setup numerous machines with the J2SE 1.4 JRE and not had any
problems, except for a few machines.  All the machines are identical
and setup the same, but they are setup by hand, the hard drives are not
copied.  They're all standard Compaq EVO machines (which is pretty much
a desktop) running Win2k Server.  In a few rare cases, whenever any
class or jar is executed, the application launcher (in our case, it's a
jar using javaw) starts, but nothing appears and the application
launcher does not exit.  We've attempted to run the application from
java.exe using the -jar option.  No exceptions are displayed, and in
fact, the logging messages are displayed, but the GUI will not show.
There is no logic that would cause the show method not be called on any
of the multiple windows that should appear.  The same application runs
fine on most machines, just in a few cases it doesn't.  If you
reinstall the JRE it does not help.  We've checked the registry keys,
and everything appears to be identical to the other machines.  If we
completely reinstall the software (from OS up), it seems to correct the
problem.  Has anyone else had this issue, and if so, is there any other
way of resolving this issue?


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