java迁移组件webdynpro：组件尚未准备好进行转换

Question

我用的是NWDS v7。31并在webdynpro应用程序中迁移组件。在备忘单上——从Interface Controller中删除实现编码的步骤中，我收到了一条错误消息：

Unhandled event loop exception

ObjectNotModifiableException: Attempt to modify read-only object: //WebDynpro/Controller:com.pwc.bc.registration.wd.parnr.approval.comp.PartnerNumberApprovalCompInterface!
at com.sap.ide.metamodel.core.DevelopmentObjectProxy._prepareForModify(DevelopmentObjectProxy.java:465)
at com.sap.ide.metamodel.webdynpro.implementation.AppClassProxy.setCodeBody(AppClassProxy.java:668)
at com.sap.ide.webdynpro.componentmigration.internal.actions.DeleteInterfaceControllerImplementationCodingAction.run(DeleteInterfaceControllerImplementationCodingAction.java:23)
at org.eclipse.ui.internal.cheatsheets.ActionRunner.runAction(ActionRunner.java:86)
at org.eclipse.ui.internal.cheatsheets.data.Action.execute(Action.java:100)
at org.eclipse.ui.internal.cheatsheets.views.CoreItem.runExecutable(CoreItem.java:497)
at org.eclipse.ui.internal.cheatsheets.views.CoreItem.runExecutable(CoreItem.java:492)
at org.eclipse.ui.internal.cheatsheets.views.CheatSheetViewer.runPerformExecutable(CheatSheetViewer.java:1044)
at org.eclipse.ui.internal.cheatsheets.views.CoreItem$1.linkActivated(CoreItem.java:89)
at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleActivate(AbstractHyperlink.java:233)
at org.eclipse.ui.forms.widgets.ImageHyperlink.handleActivate(ImageHyperlink.java:199)
at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleMouseUp(AbstractHyperlink.java:327)
at org.eclipse.ui.forms.widgets.AbstractHyperlink.access$2(AbstractHyperlink.java:311)
at org.eclipse.ui.forms.widgets.AbstractHyperlink$4.handleEvent(AbstractHyperlink.java:125)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3910)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3503)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)

然后，我取消选中文件夹属性上的只读，然后再试一次。但我在备忘单上的开始迁移步骤上仍然收到一条错误消息：

请帮我复习一下，并告诉我你的想法

谢谢