java.lang.IllegalArgumentException

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    • 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)

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