Unable to locate Spring NamespaceHandler for element 'flow'

Question

I am developing a spring webflow (2.0.7) project using SpringSource Tool Suite. I am trying to setup a basic flow.

My someflow.xml looks like this:

    <flow xmlns="http://www.springframework.org/schema/webflow"  
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://www.springframework.org/schema/webflow
                              http://www.springframework.org/schema/webflow/spring-webflow-2.0.xsd"&gt;

             <!- view-state declarations -->
    </flow>

On STS tool(Spring IDE on eclipse), I see a warning message near the flow schemaLocation:

Unable to locate Spring NamespaceHandler for element 'flow' of schema namespace 'http:// www.springframework.org/schema/webflow'

Then when tomcat starts up, I get the error

org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/webflow] Offending resource: ServletContext resource [/WEB-INF/flows/someflow.xml]

• I googled a while and some posts suggested that the problem is spring-webflow jars not being in class path. In my case, springsource tool created the template and all jars are in place. I manually checked them as well. So that can't be the issue

• One of the suggestions in this post http://forum.springsource.org/archive/index.php/t-49098.html was to splice the jar! That can't be a solution, but I tried to see if it fixes it. But no.

Stuck now.. Did anyone else face this issue?