Icy Version 1.8.6.0
Java(TM) SE Runtime Environment 1.8.0_101-b13 (64 bit)
Running on Windows 10 10.0 (amd64)
Max java memory : 3.9 GB

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java.lang.ClassCastException: java.util.HashMap$Node cannot be cast to java.util.HashMap$TreeNode
at java.util.HashMap$TreeNode.removeTreeNode(Unknown Source)
at java.util.HashMap.removeNode(Unknown Source)
at java.util.HashMap.remove(Unknown Source)
at org.pushingpixels.substance.internal.animation.StateTransitionMultiTracker$1.onFocusStateTransition(StateTransitionMultiTracker.java:91)
at org.pushingpixels.substance.internal.animation.StateTransitionTracker.fireFocusStateTransitionEvent(StateTransitionTracker.java:721)
at org.pushingpixels.substance.internal.animation.StateTransitionTracker.access$000(StateTransitionTracker.java:63)
at org.pushingpixels.substance.internal.animation.StateTransitionTracker$2.onTimelineStateChanged(StateTransitionTracker.java:214)
at org.pushingpixels.trident.Timeline$Chain.onTimelineStateChanged(Timeline.java:214)
at org.pushingpixels.trident.TimelineEngine$1.run(TimelineEngine.java:591)
at org.pushingpixels.trident.TimelineEngine$TimelineCallbackThread.run(TimelineEngine.java:242)