In the struts.xml I use:

<result name="error">error</result>

Then in my action I use:

addActionError("ERROR RETURNED");
return ERROR;

When I submit the form then it just goes to a blank page and does nothing. However, if I FORCE an exception to be thrown in the action then it goes to the error page and shows the ActionError message. So am I doing this wrong? If so, how should I tell struts to show an error page using "if statements" instead of relying solely on expensive try catches?

EDIT 1:

I'm using struts 2 version: 2.1.8.1

EDIT 2:

For example, here is my action code that I'm using to test:

String test = "";
int number = 0;
try {
        if (number == 1) {
            System.out.println("number 1: " + number);
            test = SUCCESS;
        } else if (number == 2) {
            System.out.println("number 2: " + number);
            addActionError("ERROR RETURNED?");
            addActionMessage("TESTTEST");
            test = ERROR;
        } else if (number == 3) {
            System.out.println("number 3: " + number);
            addActionError("ERROR RETURNED?");
            addActionMessage("TESTTEST");
            test = INPUT;
        } else {
            System.out.println("number 4: " + number);
            test = LOGIN;
        }
        } catch (Exception e) {
            addActionError("ERROR RETURNED? " + e);
        }
        return test;

And here is my JSP code:

<s:form action="number_save" method="post">
     <s:textfield name="number" label="Enter number" />
</s:form>
<s:actionerror />
<s:fielderror />
<s:actionmessage />

EDIT 3:

Here is a longer version of my struts.xml:

 <action name="number" method="numberCreate" class="NumberActionBean">
       <result>number.jsp</result>
 </action>

<action name="error">
    <result>error.jsp</result>
</action>

<action name="number_save" method="numberSave" class="NumberActionBean">
            <interceptor-ref name="defaultStack"></interceptor-ref>
            <result name="success" type="redirect">index</result>
            <result name="input" type="redirect">number</result>
            <result name="error">error</result>
            <result name="login" type="redirect">login</result>
            <result name="none">number</result>
</action>

EDIT 4:

My error.jsp is simply a <s:actionerror /> tag with the general taglibs and html tags...