Alice Community  

Go Back   Alice Community > Alice 2 > Works-In-Progress

Reply
 
Thread Tools Display Modes
What is wrong with this code?
Old
tfrady
Junior Member
 
Status: Offline
Posts: 1
Join Date: Apr 2018
Location: SC
Default What is wrong with this code? - 04-20-2018, 09:51 AM

Error during simulation.




Alice version: 2.4.3

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\cj4337\Desktop\Alice 2.4\Required



Throwable that caused the error:

java.lang.NullPointerException

at edu.cmu.cs.stage3.alice.core.response.CallToUserDe finedResponse$RuntimeCallToUserDefinedResponse.pro logue(CallToUserDefinedResponse.java:53)

at edu.cmu.cs.stage3.alice.core.behavior.AbstractCond itionalBehavior.internalSchedule(AbstractCondition alBehavior.java:105)

at edu.cmu.cs.stage3.alice.core.behavior.ConditionalB ehavior.internalSchedule(ConditionalBehavior.java: 42)

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:723)

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:5587)

at edu.cmu.cs.stage3.alice.authoringtool.Actions$16.a ctionPerformed(Actions.java:181)

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)
   
Reply With Quote
Old
chickentree
Super Moderator
 
Status: Offline
Posts: 250
Join Date: Dec 2012
Location: Frosno, Ca
Default 04-23-2018, 03:15 PM

I usually get something like this if I deleted an object but the object was used in an instruction within my program.
I am not positive but I think you will see an object's slot filled in with "None" if the object was removed. I believe deleted variables and parameters can also leave this type of problem behind.

Mark


Mark Henwood
mhenwood@ieee.org
   
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Copyright ©2018, Carnegie Mellon University
Alice 2.x 1999-2012, Alice 3.x 2008-2012, Carnegie Mellon University. All rights reserved.