UIX/XML BC4J - Controlling page flow in event handlers

Question

We have an event handler that executes some data processing using bc4j tags, and need to redirect the flow to another page, based on the value of some parameters. For example, we have a checkbox Prepare for another insert, and we want to check for its state in the event handler to determine which page to display.
We tried the following code
UIX page event handler:
<event name="saveEvent" >
     <bc4j:findRootAppModule name="TipoPunteggioViewAppModule" >
          <bc4j:findViewObject name="TipoPunteggioView" >
               <bc4j:findRow name="CreateTipoPunteggioView" >
                    <bc4j:setPageProperty name="keyTipoPunteggio" >
                         <bc4j:stringKey />
                    </bc4j:setPageProperty>
                    <bc4j:setAttribute name="FlgObsoleto" />
                    <bc4j:setAttribute name="Firma" />
                    <bc4j:setAttribute name="TitTipoPunteggio" />
                    <bc4j:insertRow/>
                    <bc4j:commit/>
                    <bc4j:executeQuery/>
                    <ctrl:method class="com.websiteitalia.valutazioni.handlers.Handlers"
                         method="anotherInsertEventHandler" />
               </bc4j:findRow>
          </bc4j:findViewObject>
     </bc4j:findRootAppModule>
</event>
Java method event handler:
public static EventResult anotherInsertEventHandler(BajaContext bCtx,
                                   Page page,
                                   PageEvent event) {
     // AnotherInsert is the name of the checkbox on the page
if ("on".equals(event.getParameter("AnotherInsert"))) {
          return new EventResult(page);
     } else {
          return new EventResult(new Page("ListPage"));
When we return the same page, things work fine, but when we return another page we get an ArrayIndexOutOfBoundException. We have also noticed that if we return a simple page, without data scopes and bc4j tags, we get the correct result. We are probably wrong in the manner we do the redirect inside of a java event handler, because seems that the page we return is not completely processed.
Can anyone explain the available techniques to control the page flow, using UIX XML tags or Java APIs alone or both of these together? For example, how can be replicated the <ctrl:go> behavior using Java APIs?

Answer 1

The UIX page works correctly if loaded directly, the error takes place only when we redirect in this manner from a page that has a different application module / view object scopes. In fact, when we redirect to a page that have the same scopes of the first (or when the second page has not scopes at all the simple page) the error doesnt occur. Thats why we suppose that some step of the page rendering process arent executed correctly, it seems that the new page still finds some of the old page (the scopes)..
To redirect to a page from a java event handler we have returned an event result with the next page (see above post for a code snippet), is this the correct way? Can we simulate the ctrl:go tag from the java code (with the redirect=true option)? There are any other?