[protege-discussion] Protege 3.4.4 frame to OWL conversion error

[Len Yabloko]

Hello,

I am getting this error. Can you help me understand what is causing it?

Load time for file:\C:\Users\Len\Desktop\sakilaFilm.pprj = 1 sec (project) + 9 s
ec (ui)
WARNING: Errors at save -- java.lang.NullPointerException
        at edu.stanford.smi.protegex.owl.storage.ProtegeSaver.getNewCls(Unknown
Source)
        at edu.stanford.smi.protegex.owl.storage.KnowledgeBaseCopier.getNewCls(U
nknown Source)
        at edu.stanford.smi.protegex.owl.storage.ProtegeSaver.getNewCls(Unknown
Source)
        at edu.stanford.smi.protegex.owl.storage.KnowledgeBaseCopier.getNewCls(U
nknown Source)
        at edu.stanford.smi.protegex.owl.storage.ProtegeSaver.getNewCls(Unknown
Source)
        at edu.stanford.smi.protegex.owl.storage.KnowledgeBaseCopier.createClses
(Unknown Source)
        at edu.stanford.smi.protegex.owl.storage.KnowledgeBaseCopier.run(Unknown
 Source)
        at edu.stanford.smi.protegex.owl.jena.JenaKnowledgeBaseFactory.saveKnowl
edgeBase(Unknown Source)
        at edu.stanford.smi.protege.model.Project.saveDomainKB(Unknown Source)
        at edu.stanford.smi.protege.model.Project.save(Unknown Source)
        at edu.stanford.smi.protege.ui.ProjectManager.save(Unknown Source)
        at edu.stanford.smi.protege.ui.ProjectManager.changeProjectStorageFormat
Request(Unknown Source)
        at edu.stanford.smi.protege.action.ChangeProjectStorageFormat.actionPerf
ormed(Unknown Source)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:19
95)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
a:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242
)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
        at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1
223)
        at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMen
uItemUI.java:1264)
        at java.awt.Component.processMouseEvent(Component.java:6267)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6032)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577
)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)

        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2478)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)

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

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