Problem opening Alice 2.2 worlds

[andrew_91090]

for some reason some pupils at my school can not open their saved worlds, it says

 

Unable to load world: \\***-**-***\StudentWork\Intake 2008\08JBloggs\Year 8 Folder\ICT\alice\Ollies World Of Vertu And Camel Eggs.a2w

Alice version: 2.2 9/1/2008

Throwable that caused the error:

java.util.zip.ZipException: error in opening zip file

at java.util.zip.ZipFile.open(Native Method)

at java.util.zip.ZipFile.(Unknown Source)

at java.util.zip.ZipFile.(Unknown Source)

at edu.cmu.cs.stage3.io.ZipFileTreeLoader.open(ZipFileTreeLoader.java:66)

at edu.cmu.cs.stage3.alice.authoringtool.AuthoringTool.loadWorld(AuthoringTool.java:1905)

at edu.cmu.cs.stage3.alice.authoringtool.AuthoringTool.loadWorld(AuthoringTool.java:1872)

at edu.cmu.cs.stage3.alice.authoringtool.AuthoringTool.showStartUpDialog(AuthoringTool.java:1340)

at edu.cmu.cs.stage3.alice.authoringtool.AuthoringTool.openWorld(AuthoringTool.java:1354)

at edu.cmu.cs.stage3.alice.authoringtool.Actions$2.actionPerformed(Actions.java:90)

at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.setPressed(Unknown Source)

at javax.swing.AbstractButton.doClick(Unknown Source)

at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)

at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)

at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)

at java.awt.Component.processMouseEvent(Unknown Source)

at javax.swing.JComponent.processMouseEvent(Unknown Source)

at java.awt.Component.processEvent(Unknown Source)

at java.awt.Container.processEvent(Unknown Source)

at java.awt.Component.dispatchEventImpl(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.run(Unknown Source)

 

Can anyone help?