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This bug was originally marked as duplicate of bug 226743, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.1 (Build 201510222201) VM: Java HotSpot(TM) Client VM, 25.0-b70, Java(TM) SE Runtime Environment, 1.8.0-b132 OS: Windows 7 User Comments: GUEST: After made a commit and push in github appears this problem, but just editting the JInternalFrame. When the application is running, it renders the form without problems. Stacktrace: java.lang.IllegalStateException: javax.swing.JTextField[,0,0,0x0,invalid,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=com.sun.java.swing.plaf.windows.XPStyle$XPFillBorder@1927bd0,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=javax.swing.plaf.ColorUIResource[r=0,g=0,b=0],disabledTextColor=javax.swing.plaf.ColorUIResource[r=109,g=109,b=109],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=2,left=2,bottom=2,right=2],selectedTextColor=javax.swing.plaf.ColorUIResource[r=255,g=255,b=255],selectionColor=javax.swing.plaf.ColorUIResource[r=51,g=153,b=255],columns=0,columnWidth=0,command=,horizontalAlignment=LEADING] is not attached to a vertical group at javax.swing.GroupLayout.checkComponents(GroupLayout.java:1090) at javax.swing.GroupLayout.prepare(GroupLayout.java:1040) at javax.swing.GroupLayout.layoutContainer(GroupLayout.java:910) at org.netbeans.modules.form.layoutdesign.support.SwingLayoutBuilder.createLayout(SwingLayoutBuilder.java:199) at org.netbeans.modules.form.layoutdesign.support.SwingLayoutBuilder.setupContainerLayout(SwingLayoutBuilder.java:108) at org.netbeans.modules.form.VisualReplicator.setupContainerLayout(VisualReplicator.java:900)
Created attachment 159231 [details] stacktrace
From one reporter: "I changed the JInternalFrame layout to any other, then return to free design..." That might be a culprit, but without knowing at least to which layout (and better having the sample form), it is probably not enough to find the cause. From the log the following warnings (and their number happening at once) are interesting: WARNING: Component jLabel1 found more than once in the horizontal layout definition. Removing superfluous occurrences. WARNING: Component localizacionTextField found more than once in the horizontal layout definition. Removing superfluous occurrences. WARNING: Component yacimientoTextField found more than once in the horizontal layout definition. Removing superfluous occurrences. WARNING: Component clasePozoComboBox found more than once in the horizontal layout definition. Removing superfluous occurrences. WARNING: Component jLabel33 found more than once in the horizontal layout definition. Removing superfluous occurrences. WARNING: Component tipoPozoComboBox found more than once in the horizontal layout definition. Removing superfluous occurrences. WARNING: Component jLabel30 found more than once in the horizontal layout definition. Removing superfluous occurrences. WARNING: Component jLabel32 found more than once in the horizontal layout definition. Removing superfluous occurrences. WARNING: Component bloqueTextField found more than once in the horizontal layout definition. Removing superfluous occurrences. WARNING: Component jLabel1 found more than once in the vertical layout definition. Removing superfluous occurrences. WARNING: Component localizacionTextField found more than once in the vertical layout definition. Removing superfluous occurrences. It indicates the layout was broken heavily.