java.sql.SQLException: org.apache.derby.jdbc.EmbeddedDriver n'est pas enregistré auprès du gestionnaire de pilotes JDBC.
   at org.apache.derby.jdbc.AutoloadedDriver.getDriverModule(AutoloadedDriver.java:0)
   at org.apache.derby.jdbc.EmbeddedDriver.getDriverModule(EmbeddedDriver.java:0)
   at org.apache.derby.jdbc.EmbeddedDriver.connect(EmbeddedDriver.java:0)
   at org.netbeans.modules.db.explorer.DbDriverManager.getSameDriverConnection(DbDriverManager.java:173)
   at org.netbeans.modules.db.explorer.DerbyConectionEventListener.afterDisconnect(DerbyConectionEventListener.java:115)
   at org.netbeans.modules.db.explorer.DatabaseConnector.performDisconnect(DatabaseConnector.java:181)
   at org.netbeans.modules.db.explorer.DatabaseConnection.disconnect(DatabaseConnection.java:1267)
   at org.netbeans.modules.db.explorer.DatabaseConnection.isVitalConnection(DatabaseConnection.java:318)
   at org.netbeans.modules.db.explorer.action.ExecuteCommandAction.enable(ExecuteCommandAction.java:66)
   at org.openide.util.actions.NodeAction$DelegateAction.resultChanged(NodeAction.java:615)
   at sun.reflect.GeneratedMethodAccessor60.invoke(GeneratedMethodAccessor60.java:0)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:460)
   at $Proxy2.resultChanged(.java:0)
   at org.openide.util.lookup.ProxyLookup$1Notify.run(ProxyLookup.java:179)
   at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:188)
   at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:124)
   at org.openide.explorer.DefaultEMLookup.updateLookups(DefaultEMLookup.java:134)
   at org.openide.explorer.DefaultEMLookup.propertyChange(DefaultEMLookup.java:166)
   at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:196)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
   at org.openide.explorer.ExplorerManager$2.run(ExplorerManager.java:869)
   at org.openide.util.Mutex.doEvent(Mutex.java:1341)
   at org.openide.util.Mutex.readAccess(Mutex.java:348)
   at org.openide.explorer.ExplorerManager.fireInAWT(ExplorerManager.java:866)
   at org.openide.explorer.ExplorerManager$1AtomicSetSelectedNodes.fire(ExplorerManager.java:286)
   at org.openide.explorer.ExplorerManager.setSelectedNodes(ExplorerManager.java:297)
   at org.openide.explorer.ExplorerManager$1SetExploredContextAndSelection.run(ExplorerManager.java:385)
   at org.openide.util.Mutex.readAccess(Mutex.java:365)
   at org.openide.util.Mutex$1R.run(Mutex.java:1307)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1324)
   at org.openide.util.Mutex.readAccess(Mutex.java:354)
   at org.openide.explorer.ExplorerManager.setExploredContextAndSelection(ExplorerManager.java:412)
   at org.openide.explorer.view.BeanTreeView.selectionChanged(BeanTreeView.java:147)
   at org.openide.explorer.view.TreeView.callSelectionChanged(TreeView.java:862)
   at org.openide.explorer.view.TreeView$TreePropertyListener.run(TreeView.java:1498)
   at org.openide.util.Mutex$1Exec.run(Mutex.java:1244)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1920)
   at org.openide.util.Mutex.postRequest(Mutex.java:1250)
   at org.openide.util.Mutex.postRequest(Mutex.java:1213)
   at org.openide.util.Mutex.postReadRequest(Mutex.java:568)
   at org.openide.explorer.view.TreeView$TreePropertyListener.valueChanged(TreeView.java:1468)
   at javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(DefaultTreeSelectionModel.java:629)
   at javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(DefaultTreeSelectionModel.java:1078)
   at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(DefaultTreeSelectionModel.java:287)
   at javax.swing.JTree.setSelectionPaths(JTree.java:1611)
   at javax.swing.JTree.setSelectionRows(JTree.java:1684)
   at javax.swing.JTree.setSelectionRow(JTree.java:1659)
   at org.openide.explorer.view.TreeView$PopupAdapter.showPopup(TreeView.java:1552)
   at org.openide.awt.MouseUtils$PopupMouseAdapter.maybePopup(MouseUtils.java:189)
   at org.openide.awt.MouseUtils$PopupMouseAdapter.mouseReleased(MouseUtils.java:184)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
   at java.awt.Component.processMouseEvent(Component.java:6288)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
   at java.awt.Component.processEvent(Component.java:6053)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4651)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4481)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4577)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4238)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.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:4481)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
   at java.awt.EventQueue.access$000(EventQueue.java:84)
   at java.awt.EventQueue$1.run(EventQueue.java:602)
   at java.awt.EventQueue$1.run(EventQueue.java:600)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
   at java.awt.EventQueue$2.run(EventQueue.java:616)
   at java.awt.EventQueue$2.run(EventQueue.java:614)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:613)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.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)