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via coderanch.com by Unknown author, 1 year ago
cannot add to layout: constraint must be a string
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cannot add to layout: constraint must be a string
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cannot add to lay out: constraint must be a string
java.lang.IllegalArgumentException: cannot add to layout: constraint must be a string	at java.awt.CardLayout.addLayoutComponent(CardLayout.java:190)	at java.awt.Container.addImpl(Container.java:1074)	at javax.swing.JTabbedPane.insertTab(JTabbedPane.java:703)	at javax.swing.JTabbedPane.addTab(JTabbedPane.java:777)	at javax.swing.JTabbedPane.add(JTabbedPane.java:814)	at remotepump.RemotePump.formWindowOpened(RemotePump.java:184)	at remotepump.RemotePump.access$000(RemotePump.java:31)	at remotepump.RemotePump$1.windowOpened(RemotePump.java:117)	at java.awt.AWTEventMulticaster.windowOpened(AWTEventMulticaster.java:322)	at java.awt.Window.processWindowEvent(Window.java:1862)	at javax.swing.JFrame.processWindowEvent(JFrame.java:274)	at java.awt.Window.processEvent(Window.java:1823)	at java.awt.Component.dispatchEventImpl(Component.java:4630)	at java.awt.Container.dispatchEventImpl(Container.java:2099)	at java.awt.Window.dispatchEventImpl(Window.java:2478)	at java.awt.Component.dispatchEvent(Component.java:4460)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)