saving error

[Lordcorvin]

I always get this error when i set my pointOfView variable to objects point of view, what is wrong??!!!!

An error has occurred while attempting to save your world.
This is a critical situation that needs to be dealt with immediately.

NOTE: Please check for a directory co-located with
your world named "Backups of <YourWorldNameHere>" which
should contain previously saved versions of your world.

We at the Alice Team apologize for any work you have lost

Please accept our sincerest apologies. The Alice Team.




Alice version: 2.2 09/10/2010



Throwable that caused the error:

java.lang.RuntimeException: Could not find ancestor: world, class: class edu.cmu.cs.stage3.alice.core.World
Key:
Details: null class edu.cmu.cs.stage3.alice.core.question.PointOfView


at edu.cmu.cs.stage3.alice.core.Element.internalGetKe y(Element.java:776)

at edu.cmu.cs.stage3.alice.core.Element.getKey(Elemen t.java:791)

at edu.cmu.cs.stage3.alice.core.reference.DefaultRefe renceGenerator.generateReference(DefaultReferenceG enerator.java:39)

at edu.cmu.cs.stage3.alice.core.Property.encodeRefere nce(Property.java:651)

at edu.cmu.cs.stage3.alice.core.Property.encode(Prope rty.java:681)

at edu.cmu.cs.stage3.alice.core.Element.internalStore (Element.java:1670)

at edu.cmu.cs.stage3.alice.core.Element.internalStore (Element.java:1722)

at edu.cmu.cs.stage3.alice.core.Element.internalStore (Element.java:1722)

at edu.cmu.cs.stage3.alice.core.Element.store(Element .java:1768)

at edu.cmu.cs.stage3.alice.core.Element.store(Element .java:1781)

at edu.cmu.cs.stage3.alice.core.Element.store(Element .java:1784)

at edu.cmu.cs.stage3.alice.core.Element.store(Element .java:1816)

at edu.cmu.cs.stage3.alice.authoringtool.dialog.Store ElementProgressPane.construct(StoreElementProgress Pane.java:42)

at edu.cmu.cs.stage3.progress.ProgressPane$2.run(Prog ressPane.java:84)

at java.lang.Thread.run(Unknown Source)