Error when trying to play

[BadWolfGeronimo]

Everytime I try to play my code, this error pops up after a few seconds. If it's not doing this then there is another error that makes the play screen black and I have to restart the app every time I need to play the program. My final is due tomorrow so of course this is perfect timing.



Error during simulation.




Alice version: 2.3.5

os.name: Windows NT (unknown)

os.version: 6.2

os.arch: x86

java.vm.name: Java HotSpot(TM) Client VM

java.vm.version: 20.0-b11

user.dir: C:\Users\lindsay\Documents\Alice2.3\Alice 2.3\Required



Throwable that caused the error:

edu.cmu.cs.stage3.alice.core.IllegalPropertyValueE xception: element must not be null.

at edu.cmu.cs.stage3.alice.core.response.PropertyAnim ation$RuntimePropertyAnimation.prologue(PropertyAn imation.java:123)

at edu.cmu.cs.stage3.alice.core.response.DoTogether$R untimeDoTogether.prologue(DoTogether.java:55)

at edu.cmu.cs.stage3.alice.core.response.DoInOrder$Ru ntimeDoInOrder.childPrologueIfNecessary(DoInOrder. java:53)

at edu.cmu.cs.stage3.alice.core.response.DoInOrder$Ru ntimeDoInOrder.update(DoInOrder.java:100)

at edu.cmu.cs.stage3.alice.core.response.CallToUserDe finedResponse$RuntimeCallToUserDefinedResponse.upd ate(CallToUserDefinedResponse.java:88)

at edu.cmu.cs.stage3.alice.core.response.DoInOrder$Ru ntimeDoInOrder.childUpdate(DoInOrder.java:58)

at edu.cmu.cs.stage3.alice.core.response.DoInOrder$Ru ntimeDoInOrder.update(DoInOrder.java:101)

at edu.cmu.cs.stage3.alice.core.response.DoInOrder$Ru ntimeDoInOrder.childUpdate(DoInOrder.java:58)

at edu.cmu.cs.stage3.alice.core.response.DoInOrder$Ru ntimeDoInOrder.update(DoInOrder.java:101)

at edu.cmu.cs.stage3.alice.core.response.CallToUserDe finedResponse$RuntimeCallToUserDefinedResponse.upd ate(CallToUserDefinedResponse.java:88)

at edu.cmu.cs.stage3.alice.core.behavior.TriggerBehav ior.internalSchedule(TriggerBehavior.java:69)

at edu.cmu.cs.stage3.alice.core.Behavior.schedule(Beh avior.java:235)

at edu.cmu.cs.stage3.alice.core.Sandbox.scheduleBehav iors(Sandbox.java:70)

at edu.cmu.cs.stage3.alice.core.World.scheduleBehavio rs(World.java:457)

at edu.cmu.cs.stage3.alice.core.World.schedule(World. java:499)

at edu.cmu.cs.stage3.alice.core.clock.DefaultClock.sc hedule(DefaultClock.java:99)

at edu.cmu.cs.stage3.alice.authoringtool.AuthoringToo l$7.run(AuthoringTool.java:712)

at edu.cmu.cs.stage3.alice.authoringtool.util.Default Scheduler.simulateOnce(DefaultScheduler.java:117)

at edu.cmu.cs.stage3.alice.authoringtool.util.Default Scheduler.run(DefaultScheduler.java:78)

at edu.cmu.cs.stage3.scheduler.AbstractScheduler.run( AbstractScheduler.java:45)

at java.awt.event.InvocationEvent.dispatch(Invocation Event.java:209)

at java.awt.EventQueue.dispatchEventImpl(EventQueue.j ava:641)

at java.awt.EventQueue.access$000(EventQueue.java:84)

at java.awt.EventQueue$1.run(EventQueue.java:602)

at java.awt.EventQueue$1.run(EventQueue.java:600)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.AccessControlContext$1.doIntersectio nPrivilege(AccessControlContext.java:87)

at java.awt.EventQueue.dispatchEvent(EventQueue.java: 611)

at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:269)

at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:184)

at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:178)

at java.awt.Dialog$1.run(Dialog.java:1046)

at java.awt.Dialog$3.run(Dialog.java:1098)

at java.security.AccessController.doPrivileged(Native Method)

at java.awt.Dialog.show(Dialog.java:1096)

at java.awt.Component.show(Component.java:1584)

at java.awt.Component.setVisible(Component.java:1536)

at java.awt.Window.setVisible(Window.java:842)

at java.awt.Dialog.setVisible(Dialog.java:986)

at edu.cmu.cs.stage3.swing.DialogManager.showModalDia log(DialogManager.java:66)

at edu.cmu.cs.stage3.swing.DialogManager.showDialog(D ialogManager.java:136)

at edu.cmu.cs.stage3.alice.authoringtool.AuthoringToo l.play(AuthoringTool.java:5496)

at edu.cmu.cs.stage3.alice.authoringtool.Actions$16.a ctionPerformed(Actions.java:180)

at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:1995)

at javax.swing.AbstractButton$Handler.actionPerformed (AbstractButton.java:2318)

at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:387)

at javax.swing.DefaultButtonModel.setPressed(DefaultB uttonModel.java:242)

at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(BasicButtonListener.java:236)

at java.awt.AWTEventMulticaster.mouseReleased(AWTEven tMulticaster.java:272)

at java.awt.Component.processMouseEvent(Component.jav a:6288)

at javax.swing.JComponent.processMouseEvent(JComponen t.java:3267)

at java.awt.Component.processEvent(Component.java:605 3)

at java.awt.Container.processEvent(Container.java:204 1)

at java.awt.Component.dispatchEventImpl(Component.jav a:4651)

at java.awt.Container.dispatchEventImpl(Container.jav a:2099)

at java.awt.Component.dispatchEvent(Component.java:44 81)

at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4577)

at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:4238)

at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:4168)

at java.awt.Container.dispatchEventImpl(Container.jav a:2085)

at java.awt.Window.dispatchEventImpl(Window.java:2478 )

at java.awt.Component.dispatchEvent(Component.java:44 81)

at java.awt.EventQueue.dispatchEventImpl(EventQueue.j ava:643)

at java.awt.EventQueue.access$000(EventQueue.java:84)

at java.awt.EventQueue$1.run(EventQueue.java:602)

at java.awt.EventQueue$1.run(EventQueue.java:600)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.AccessControlContext$1.doIntersectio nPrivilege(AccessControlContext.java:87)

at java.security.AccessControlContext$1.doIntersectio nPrivilege(AccessControlContext.java:98)

at java.awt.EventQueue$2.run(EventQueue.java:616)

at java.awt.EventQueue$2.run(EventQueue.java:614)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.AccessControlContext$1.doIntersectio nPrivilege(AccessControlContext.java:87)

at java.awt.EventQueue.dispatchEvent(EventQueue.java: 613)

at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:269)

at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:184)

at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:174)

at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:169)

at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:161)

at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:122)