HtmlDataTable.hasErrorMessages is true -- how to access the error messages??

[Wayne Fay]

I'm getting the following error message on a Tomahawk DataTable:

javax.faces.FacesException:
org.apache.myfaces.component.html.ext.HtmlDataTable.hasErrorMessages(Ljavax/faces/context/FacesContext;)Z
at 
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421)
at 
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)    
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)       
at com.evermind[Oracle Application Server Containers for J2EE 10g
(10.1.2.0.0)].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)


I'm just wondering how I can programmatically access the HtmlDataTable
error messages in my JSPX page?

I have a ton of log.trace() messages in my code and things are more or
less proper. So I'd like to read the error messages out of that
HtmlDataTable object and see what exactly is going on...

Here's the declaration of my DataTable, though I don't think it is
terribly useful:

<t:dataTable id="externalData"
          cellpadding="5"
          border="1"
          rowClasses="data_row"
          headerClass="data_table"
          value="#{externalDataAction.externalDataList}"
          sortColumn="#{externalDataAction.sort}"
          sortAscending="#{externalDataAction.ascending}"
          forceIdIndexFormula="#{externalData.externalData.id}"
          var="externalData"
          preserveSort="true">

Thanks for any assistance!
Wayne