cannot import development configuration in NWDS

Dear all, i hit this error when i tried to import the development configuration in NWDS.

CIM_ERR_FAILED: No object manager started (application stopped)

com.sap.lcr.api.cimclient.LcrException: CIM_ERR_FAILED: No object manager started (application stopped)

at com.sap.lcr.api.cimclient.SimpleResponseAnalyser.raiseExceptionOnError(SimpleResponseAnalyser.java:120)

at com.sap.lcr.api.cimclient.SimpleResponseAnalyser.getIResult(SimpleResponseAnalyser.java:53)

at com.sap.lcr.api.cimclient.CIMOMClient.sendImpl(CIMOMClient.java:215)

at com.sap.lcr.api.cimclient.CIMOMClient.send(CIMOMClient.java:147)

at com.sap.lcr.api.cimclient.CIMOMClient.enumerateInstancesImpl(CIMOMClient.java:436)

at com.sap.lcr.api.cimclient.CIMOMClient.enumerateInstances(CIMOMClient.java:740)

at com.sap.lcr.api.cimclient.CIMClient.enumerateInstances(CIMClient.java:983)

at com.sap.lcr.api.sapmodel.JavaCIMObjectAccessor.enumerateInstances(JavaCIMObjectAccessor.java:211)

at com.sap.lcr.api.sapmodel.SAP_DesignTimeConfigurationAccessor.enumerateInstances(SAP_DesignTimeConfigurationAccessor.java:168)

at com.sap.ide.eclipse.component.devconf.DevConfManager$3.run(DevConfManager.java:507)

at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)

at com.sap.ide.eclipse.component.devconf.DevConfManager.listRemoteDevConfNames(DevConfManager.java:500)

at com.sap.ide.eclipse.component.wizard.LoadDevConfPage.fillTable(LoadDevConfPage.java:225)

at com.sap.ide.eclipse.component.wizard.LoadDevConfPage$5.widgetSelected(LoadDevConfPage.java:281)

at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:89)

at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:81)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:840)

at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2022)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1729)

at org.eclipse.jface.window.Window.runEventLoop(Window.java:583)

at org.eclipse.jface.window.Window.open(Window.java:563)

at com.sap.ide.eclipse.component.provider.actions.DevConfNewAction.run(DevConfNewAction.java:46)

at com.tssap.selena.model.extension.action.SelenaActionCollector$GenericElementActionWrapper.run(SelenaActionCollector.java:229)

at com.tssap.util.ui.menu.MenuFactory$MuSiAction.saveRunAction(MenuFactory.java:1425)

at com.tssap.util.ui.menu.MenuFactory$MuSiAction.run(MenuFactory.java:1391)

at com.tssap.util.ui.menu.MenuFactory$DelegateAction.processInternal(MenuFactory.java:616)

at com.tssap.util.ui.menu.MenuFactory$DelegateAction.access$100(MenuFactory.java:586)

at com.tssap.util.ui.menu.MenuFactory$DelegateAction$BusyProcessWorker.run(MenuFactory.java:716)

at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)

at com.tssap.util.ui.menu.MenuFactory$DelegateAction.process(MenuFactory.java:610)

at com.tssap.util.ui.menu.internal.MenuListenerFactory$ProcessAdapter.widgetSelected(MenuListenerFactory.java:172)

at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:89)

at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:81)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:840)

at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2022)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1729)

at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1402)

at org.eclipse.ui.internal.Workbench.run(Workbench.java:1385)

at com.tssap.util.startup.WBLauncher.run(WBLauncher.java:79)

at org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoader.java:858)

at org.eclipse.core.boot.BootLoader.run(BootLoader.java:461)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:324)

at com.sap.ide.eclipse.startup.Main.basicRun(Main.java:286)

at com.sap.ide.eclipse.startup.Main.run(Main.java:795)

at com.sap.ide.eclipse.startup.Main.main(Main.java:602)

anyidea what's the problem and how to solve it? thank you