Hi, Kerry.
Well, I don't know about moving stones, but...
I think the problem here might be that the class being sought is part of Matisse (the GUI builder and support in NetBeans) and it's not to be found anywhere.
If I recall correctly, the GroupLayout$Group class is in javax.swing in Java SE 6 (and therefore in Java's rt.jar) but that for Java SE 5 you needed to include the NetBeans library in the application (or the app client in your case). And I'm not sure but I think the class was in a different package then also.
Is there a chance that you used NetBeans to build the app (and app client) with a Java 6 SDK set up but are using Java SE 5 to try to run? That would explain why that the GUI is referring to that class but the class is not found.
- Tim
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