java.lang.ClassCastException: Assigning instance of class org.openide.src.FieldElement to field org.netbeans.modules.java.FieldElementImpl#prevField
	at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2270)
	at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:519)
	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1411)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
	at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2262)
	at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:519)
	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1411)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
	at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2262)
	at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:519)
	at org.netbeans.modules.java.ElementImpl.readObject(ElementImpl.java:187)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:2213)
	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1410)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
	at java.util.LinkedList.readObject(LinkedList.java:687)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:2213)
	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1410)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
	at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2262)
	at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:519)
	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1411)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
	at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2262)
	at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:519)
	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1411)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
	at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2262)
	at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:519)
	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1411)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
	at java.io.ObjectInputStream.inputArray(ObjectInputStream.java:1142)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:374)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
	at org.netbeans.core.NbNodeOperation$Sheet.readExternal(NbNodeOperation.java:291)
	at org.openide.windows.TopComponent$Replacer.readObject(TopComponent.java:682)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:2213)
	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1410)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
	at org.openide.util.io.NbMarshalledObject.get(NbMarshalledObject.java:88)
	at org.netbeans.core.windows.WindowManagerImpl$TopComponentManager.validateData(WindowManagerImpl.java:1154)
	at org.netbeans.core.windows.MultiTabContainer.validateData(MultiTabContainer.java:908)
	at org.netbeans.core.windows.ModeImpl.validateData(ModeImpl.java:801)
	at org.netbeans.core.windows.WorkspaceImpl.validateData(WorkspaceImpl.java:764)
	at org.netbeans.core.windows.WindowManagerImpl$SerializationReplacer.readResolve(WindowManagerImpl.java:697)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.io.ObjectStreamClass.invokeMethod(ObjectStreamClass.java:1615)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:393)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
	at org.openide.util.io.NbMarshalledObject.get(NbMarshalledObject.java:88)
	at org.openidex.projects.ProjectSupport.updateWindowManager(ProjectSupport.java:310)
	at org.openidex.projects.ProjectSupport.projectOpen(ProjectSupport.java:299)
	at org.netbeans.modules.projects.PSupport.projectOpen(PSupport.java:133)
	at org.netbeans.core.NbProjectOperation.setProject(NbProjectOperation.java:146)
	at org.netbeans.core.NbProjectOperation.openOrCreateProject(NbProjectOperation.java:198)
	at org.netbeans.core.NonGui.run(NonGui.java:378)
	at org.netbeans.core.Main.run(Main.java:191)
	at org.openide.TopManager.initializeTopManager(TopManager.java:115)
	at org.openide.TopManager.getDefault(TopManager.java:81)
	at org.netbeans.core.Main.main(Main.java:275)
	at org.netbeans.core.TopThreadGroup.run(TopThreadGroup.java:90)
	at java.lang.Thread.run(Thread.java:484)