java.lang.reflect.InvocationTargetException

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    java.lang.reflect.InvocationTargetException
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    java.lang.IllegalArgumentException: Children: duplicate children added: parent = Grid hgap=4.0, vgap=4.0, alignment=TOP_LEFT
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    java.lang.RuntimeException: Exception in Application start method

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Root Cause Analysis

  1. java.lang.IllegalArgumentException

    Children: cycle detected: parent = Group@1c73f0a[styleClass=root], node = Group@1c73f0a[styleClass=root]

    at javafx.scene.Parent$2.onProposedChange()
  2. javafx.scene
    Parent$2.onProposedChange
    1. javafx.scene.Parent$2.onProposedChange(Parent.java:445)
    1 frame
  3. com.sun.javafx
    VetoableListDecorator.add
    1. com.sun.javafx.collections.VetoableListDecorator.add(VetoableListDecorator.java:206)
    1 frame
  4. Unknown
    FXMain.start
    1. FXMain.start(FXMain.java:23)
    1 frame
  5. com.sun.javafx
    PlatformImpl.lambda$null$173
    1. com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    2. com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    3. com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    3 frames
  6. Java RT
    AccessController.doPrivileged
    1. java.security.AccessController.doPrivileged(Native Method)
    1 frame
  7. com.sun.javafx
    PlatformImpl.lambda$runLater$174
    1. com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    1 frame
  8. com.sun.glass
    WinApplication.lambda$null$148
    1. com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    2. com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    3. com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    3 frames
  9. Java RT
    Thread.run
    1. java.lang.Thread.run(Unknown Source)
    1 frame