WDRuntimeException: Duplicate instance exception

[Former Member]

Hello,

I am not able to figure out this exception.

com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Duplicate instance exception: There is already an instance of view CourseDetails in component CourseRegistrationComp.
	at com.sap.tc.webdynpro.progmodel.controller.Component.addViewController(Component.java:137)
	at com.sap.tc.webdynpro.progmodel.view.View.setUsage(View.java:816)
	at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:706)
	at com.sap.tc.webdynpro.progmodel.view.ViewManager.bindRoot(ViewManager.java:579)
	at com.sap.tc.webdynpro.progmodel.view.ViewManager.init(ViewManager.java:155)
	at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.doOpen(WebDynproWindow.java:295)
	at com.sap.tc.webdynpro.clientserver.window.ApplicationWindow.handle(ApplicationWindow.java:258)
	at com.sap.tc.webdynpro.clientserver.window.ApplicationWindow.handleWindowEvents(ApplicationWindow.java:238)
	at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:149)
	at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:321)
	at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingStandalone(ClientSession.java:713)
	at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:666)
	at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:250)
	at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:149)
	at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)
	at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:53)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
	at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
	at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:386)
	at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:364)
	at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:1039)
	at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:265)
	at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
	at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
	at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
	at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
	at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:102)
	at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:172)

how to fix this...

Thanks

Srinivas

[Former Member · Accepted solution]

Hi Srinivas,

Please explain what you are try to do.

Is the CourseDetails details view called from within itself? Looks like you are trying to instaniate it again.

Regards,

Kartikaye

[Former Member · Accepted solution]

Hi Kartikaye,

I am embedding 5 views in a window. There is one home page view. Each view is also embedded in a separate window

downloadView

l

l

scheduleView--

---

HomeView--

---

CourseDetailsView

l

l

RegisterStudentView

The links are connected using inbound and outbound plugs

In the HomeView, through a button action, am calling a component Controller method.

//Preparing window object
	 scheduleWindow = wdComponentAPI.getWindowManager().createModalWindow(wdComponentAPI.getComponentInfo().findInWindows("ScheduleCourse"));
	 // setting window position
	 scheduleWindow.setWindowPosition(WDWindowPos.CENTER);
	 scheduleWindow.show();

And in the popup View, through another button action, am calling another component Controller method.

scheduleWindow.destroyInstance();

Any thing wrong here...

Srinivas

[Former Member · Accepted solution]

Hi Srinivas,

Deplicate View usage is not allowed in Web Dynpro.

You can refer to the post for more info:

Regards,

Kartikaye

[Former Member · Accepted solution]

Hi Kartikaye,

How to implement this scenario then:

In view 1, on a button click, a pop-up window appears with view2 ?

[Former Member · Accepted solution]

Hi Srinivas,

Then you dont need to embed view2 in both the windows.

Remove view2 from the default window and embed it only in the window called for the pop up.

Regards,

Kartikaye

[Former Member · Accepted solution]

Hi Kartikaye,

Thanks, its working, after I also deleted the inbound, outbound plugs.

[Former Member · Accepted solution]

Hi Srinivas,

Please grant the points for the correct answers.

Thanks,

Kartikaye