Dynamic regions issue data transmission was interrupted

Question

Hi. I'm using JDev 11.2.2 and ADF full stack.
Issue is when I'm trying to refresh a dynamic region to load a new task flow. Let me give a test case step by step:
1.- Using HR, build model: Create objects(Entities, View Objects) for tables Employees and Departments and an Application Module.
2.-In VC, add a facelets page with two columns layout, first for a tree for switching regions and a dynamic region in the second column.
3.- Create a page fragment which includes a table generated from employees view in data controls and another page fragment for departments view.
4.- Create two bounded task flows, one for employees fragment and another for departments fragment.
5.- Drag and drop a bounded task flow to create a dynamic region in the second column of main page. Make sure selecting backingBean scope for new bean (default is Request scope).
6.- In model, create a static list populated View Object with two attributes: one for task flow id and one for description
7.- In VC, generate a Tree in the first column of main page
8.- Write a selection listener for tree component to read the current task flow id and set that value to dynamic region task flow id in appropriate bean.
9.- Set partials triggers in dynamic region in the main page to listen to tree events.
10.- Run and try to load a new task flow by clicking in the tree. An alert is fired with this message:
*"The content of this page failed to load as expected because data transmission was interrupted. Please try again, or contact your system administrator."*
And, in the log appears following lines:
*<FaceletViewHandlingStrategy> <handleRenderException> Error Rendering View[index.jsf]*
java.lang.IllegalStateException: Could not find component to stream
     at oracle.adfinternal.view.faces.streaming.StreamingDataManager.submit(StreamingDataManager.java:378)
     at oracle.adfinternal.view.faces.renderkit.rich.DocumentRenderer._encodeStreamingResponse(DocumentRenderer.java:3666)
     at oracle.adfinternal.view.faces.renderkit.rich.DocumentRenderer.encodeAll(DocumentRenderer.java:1474)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:511)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:923)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1681)
     at oracle.adfinternal.view.faces.context.PartialViewContextImpl._processRender(PartialViewContextImpl.java:321)
     at oracle.adfinternal.view.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:152)
     at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:974)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1674)
     at oracle.adfinternal.view.faces.component.AdfViewRoot.encodeAll(AdfViewRoot.java:91)
     at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:399)
     at org.apache.myfaces.trinidadinternal.application.ViewDeclarationLanguageFactoryImpl$ChangeApplyingVDLWrapper.renderView(ViewDeclarationLanguageFactoryImpl.java:350)
     at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
     at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:273)
     at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:165)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._renderResponse(LifecycleImpl.java:1032)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:339)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:237)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:509)
     at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
     at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
     at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:173)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:125)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:468)
     at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:468)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:293)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:199)
     at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119)
     at java.security.AccessController.doPrivileged(Native Method)
     at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315)
     at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442)
     at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103)
     at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171)
     at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:139)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
     at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
     at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
     at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
If the taskflow id of taskflow which didn't work is established in dynamic region bean as initial taskflow for the region, it works, but the other taskflow fails.....
Any suggestions?
DEMR

Answer 1

Thank you. That solves the issue. Maybe a mistake in docs:
[http://docs.oracle.com/cd/E35521_01/web.111230/e16182/taskflows_regions.htm#CHDJHACA]
It says:
To create an ADF dynamic region:
In the Application Navigator, select and open the JSF page where you want to create the ADF dynamic region.
Drag and drop the first bounded task flow onto the JSF page.
From the context menu that JDeveloper displays, choose Create > Dynamic Region.
Choose the appropriate option in the Choose Managed Bean for Dynamic Region dialog that JDeveloper displays:
If you want an existing managed bean to store the bounded task flow's ID, select an existing managed bean from the Managed Bean dropdown list.
The managed bean passes the value of the bounded task flow's ID into the task flow binding of the ADF dynamic region. Make sure that the managed bean you select is not used by another ADF dynamic region.
If no managed bean exists for the page, click the Add icon next to the Managed Bean dropdown list to create a new one. Enter values in the dialog that appears as follows:
Bean Name: Enter a name for the new managed bean. For example, enter DynamicRegionBean.
Class Name: Enter the name of the new managed bean class.
Package: Enter the name of the package that is to contain the managed bean or browse to locate it.
Extends: Enter the name of the Java class that the managed bean extends. The default value is java.lang.Object.
Scope: This field is read-only and its value is set to backingBean. For more information about the memory scope for managed beans, see Section 18.2.4, "What You May Need to Know About Memory Scope for Task Flows."
Click OK to close the dialogs where you configure the managed bean.
Regards,
DEMR