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Build: NetBeans IDE 8.0 (Build 201403101706) VM: Java HotSpot(TM) 64-Bit Server VM, 24.51-b03, Java(TM) SE Runtime Environment, 1.7.0_51-b13 OS: Linux User Comments: GUEST: When I have copied and renamed components. pepijn: Don't know. Working with the visual editor when I noticed this on the Notifications panel. GUEST: incluind componentes em painel Stacktrace: java.lang.IllegalArgumentException: Component must be non-null at javax.swing.GroupLayout$ComponentSpring.<init>(GroupLayout.java:2953) at javax.swing.GroupLayout$ComponentSpring.<init>(GroupLayout.java:2933) at javax.swing.GroupLayout$Group.addComponent(GroupLayout.java:1524) at javax.swing.GroupLayout$SequentialGroup.addComponent(GroupLayout.java:1816) at org.netbeans.modules.form.layoutdesign.support.SwingLayoutBuilder.fillGroup(SwingLayoutBuilder.java:304) at org.netbeans.modules.form.layoutdesign.support.SwingLayoutBuilder.composeGroup(SwingLayoutBuilder.java:242)
Created attachment 147098 [details] stacktrace