java.io.IOException: Object type not recognized: 54
        at org.netbeans.mdr.util.IOUtils.read(IOUtils.java:399)
        at org.netbeans.mdr.util.IOUtils.read(IOUtils.java:222)
        at org.netbeans.mdr.util.IOUtils.read(IOUtils.java:381)
        at org.netbeans.mdr.storagemodel.StorableFeatured.read(StorableFeatured.
java:209)
        at org.netbeans.mdr.storagemodel.StorableObject.read(StorableObject.java
:223)
        at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.get
Record(BtreeDatabase.java:880)
        at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.get
IfExists(BtreeDatabase.java:632)
        at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.get
IfExists(BtreeDatabase.java:612)
        at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.get
(BtreeDatabase.java:647)
        at org.netbeans.mdr.storagemodel.MdrStorage.getObject(MdrStorage.java:32
7)
        at org.netbeans.mdr.storagemodel.StorableObject.getImmediateComposite(St
orableObject.java:108)
        at org.netbeans.mdr.handlers.InstanceHandler.refImmediateComposite(Insta
nceHandler.java:68)
        at org.netbeans.mdr.handlers.InstanceHandler.refOutermostComposite(Insta
nceHandler.java:51)
        at org.netbeans.lib.jmi.xmi.XMIWriterImpl.writePackage(XMIWriterImpl.jav
a:530)
        at org.netbeans.lib.jmi.xmi.XMIWriterImpl.writePackage(XMIWriterImpl.jav
a:542)
        at org.netbeans.lib.jmi.xmi.XMIWriterImpl.writeDocument(XMIWriterImpl.ja
va:486)
        at org.netbeans.lib.jmi.xmi.XMIWriterImpl.write(XMIWriterImpl.java:120)
        at org.netbeans.modules.mdrtoolkit.looks.reflect.actions.SaveXMIAction$1
.run(SaveXMIAction.java:111)
        at org.openide.util.Task.run(Task.java:152)
        at org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcesso
r.java:622)