"Unhandled exception has occurred" error appears when clicking a table's "Columns" or "Relationships" tab in Rational Rose

Symptom

The full error message is:


Table Specification for [YourTableName]:
Unhandled exception has occurred in a component in your application.  If you click Continue, the application will ignore this error and attempt to continue.  

Object reference not set to an instance of an object.


and its screenshot is as follows:



The following is the complete error log after clicking the Details command button:

See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.NullReferenceException: Object reference not set to an instance of an object. at com.rational.rose.dm.core.collaboration.model.store.mediation.DataModelPersistentTransitoryMediator.execute() at com.rational.rose.dm.core.collaboration.model.store.connection.ModelStoreDataModelConnection.refreshCurrentTransitoryModel(IGraphConfiguration graphConfiguration) at com.rational.rose.dm.core.feature.services.editing.ModelStoreInteractionTableAdvisor.refreshDataModel(SByte graphConfigurationType, SByte graphConfigurationClassDepth) at com.rational.rose.dm.core.feature.invocation.construction.adapters.TableInteractionTransitoryAdapter.refreshDataModel() at com.rational.rose.dm.core.feature.invocation.construction.adapters.TableInteractionTransitoryAdapter.fullyLoadGraph() at com.rational.rose.dm.core.feature.invocation.construction.adapters.TableInteractionTransitoryAdapter.get_Columns() at com.rational.rose.dm.core.user.table.ColumnSummaryViewer.load(IInteraction interactor) at com.rational.rose.dm.core.user.foundation.PropertyPage.internalLoad() at com.rational.rose.dm.core.user.foundation.PropertyPage.load(IInteraction interactor) at com.rational.rose.dm.core.user.foundation.PropertySheet.loadActivePage() at com.rational.rose.dm.core.user.foundation.PropertySheet.onPropertyPageChanged(Object source, EventArgs event_Renamed) at System.Windows.Forms.TabControl.OnSelectedIndexChanged(EventArgs e) at System.Windows.Forms.TabControl.WmSelChange() at System.Windows.Forms.TabControl.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) ************** Loaded Assemblies ************** mscorlib Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) CodeBase: file:///c:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll ---------------------------------------- DMNET Assembly Version: 2006.0.0.4 Win32 Version: 2006.0.0.4 CodeBase: file:///C:/Program%20Files/Rational/Rose/datamodeler/DMNET.DLL ---------------------------------------- System.Windows.Forms Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll ---------------------------------------- Resource Assembly Version: 2006.0.0.4 Win32 Version: 2006.0.0.4 CodeBase: file:///C:/Program%20Files/Rational/Rose/datamodeler/Resource.DLL ---------------------------------------- Interop.Rational.RationalRose Assembly Version: 4.2.0.0 Win32 Version: 4.2.0.0 CodeBase: file:///C:/WINDOWS/assembly/GAC/Interop.Rational.RationalRose/4.2.0.0__6cd13fc49d9615d8/Interop.Rational.RationalRose.dll ---------------------------------------- wm-xml Assembly Version: 3.4.2222.25579 Win32 Version: 3.4.2222.25579 CodeBase: file:///C:/Program%20Files/Rational/Rose/Web%20Modeler/wm-xml.DLL ---------------------------------------- System.Drawing Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll ---------------------------------------- System Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll ---------------------------------------- Accessibility Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Accessibility/2.0.0.0__b03f5f7f11d50a3a/Accessibility.dll ---------------------------------------- ************** JIT Debugging ************** To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled. For example: When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box.