How to change from rendering a fragment in tiles with ajax to a whole new error page?

Hi all!

I have a question about error handling with Spring MVC, Tiles and SpringJS. I have some pages that have fragments to be reloaded using ajax calls. That is working fine, the problem is I want to change that behaviour when an error is thrown.
I have defined a HandlerExceptionResolver which intercepts every exception and redirect to the correct error page. If the exception occurs in a RequestMapping call within Spring MVC this is working fine but I can't make it work with ajax calls because it just tries to render the page inside the fragment is told to in the first place.
This is my code:

servlet-context.xml. Here I define the tiles view resolver and the exception handler among other things. The view resolver has some caching code inside, that's why it's extended by another class. Maybe I could put something here to get the behaviour I want?

Code:

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<bean id="viewResolver"    class="com.bbvacompass.monarch.web.servlet.view.custom.CustomAjaxUrlBasedViewResolver">
                <property name="viewClass" value="org.springframework.webflow.mvc.view.FlowAjaxTilesView" />
                <property name="mappings" ref="custom-redirect-views"/>
</bean>       

<bean id="tilesConfigurer" class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
        <property name="definitions">
                <list>
                        <value>/WEB-INF/**/tiles.xml</value>
                        <value>classpath*:/WEB-INF/**/*.tiles.xml</value>
                </list>
        </property>
</bean>

<bean class="com.bbvacompass.monarch.web.servlet.interceptor.CustomHandlerExceptionResolver"/>

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This is the jsp where the call is made

Code:

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<form id="tfilter" action="<c:url value="/custom/summary/postedTransactions" />" >
        <label id="lposted" for="posted" class="checked"><fmt:message key="account_summary.custom.posted" />  </label>
        <input type="radio" id="posted" name="table_type" />
        <label id="lpending" for="pending"><fmt:message key="account_summary.custom.pending" /></label>
        <input type="radio" id="pending" name="table_type" />
        <input type="hidden" name="transfersType" id="transfersType" >
        <input type="hidden" name="selected_account" id="selected_account">
</form>
                                       
<script type="text/javascript">
        Spring.addDecoration(new Spring.AjaxEventDecoration({elementId: "posted" ,event:"onclick",formId:'tfilter',params: { fragments: "transactions"}}));
        Spring.addDecoration(new Spring.AjaxEventDecoration({elementId: "pending",event:"onclick",formId:'tfilter',params: { fragments: "transactions"}}));
</script>
                                       
<form id="select_actions" action="<c:url value="/custom/summary/updateSlider" />">
            <select id="s_actions">
                    <option value="0"><fmt:message key="account_summary.custom.actions" /></option>
                <option id="option1" value="within"><fmt:message key="account_summary.custom.action.transfer.within" /></option>
                <option id="option2" value="between"><fmt:message key="account_summary.custom.action.transfer.between" /></option>
                <option id="option3" value="billpay"><fmt:message key="account_summary.custom.action.billpay" /></option>
                <option id="option4" value="simple_payments"><a href="<c:url value="/popMoney?origin=popMoneyMenu"/>"><fmt:message key="account_summary.custom.action.simple" /></a></option>
                <option id="option5" value="download"><fmt:message key="account_summary.custom.action.download" /></option>
            </select>
</form>

<tiles:insertAttribute name="transactions" />

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This is the tiles.xml

Code:

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        <definition name="summary-body" template="/WEB-INF/views/custom-monarch/account-summary/account-summary.jsp" >
                <put-attribute name="script" value="/WEB-INF/views/custom-monarch/account-summary/script-account-summary.jsp" />
                <put-attribute name="slider" value="/WEB-INF/views/custom-monarch/account-summary/slider.jsp" />
                <put-attribute name="search" value="/WEB-INF/views/custom-monarch/account-summary/search.jsp" />
                <put-attribute name="transactions" value="/WEB-INF/views/custom-monarch/account-summary/transactions.jsp" />
        </definition>

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The mapping for the /custom/summary/postedTransactions uri now just throws an exception

Code:

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@RequestMapping(value="/postedTransactions", method={RequestMethod.GET})
        public String getPostedTransactions(HttpServletRequest request, ModelMap model,
@ModelAttribute("iteProfile") String iteProfile,
@ModelAttribute("searchForm") SearchCmd searchForm,
@ModelAttribute("selectedAccount")AccountListAdapterBean selectedAccount) throws Exception{
      throw new Exception("asdfdsafsdf");
}

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