Simple Transformation from ABAP to XML and back

Question

Hi experts,
Can anyone provide me a simple example of a 'simple transformation' that will convert and internal table with more than one column into XML via a simple transformation.
I've spend days now reading SAP help and e-learning examples, but this just won't work and I am getting short dumps saying 'The goal was to access variable "ROOT". However, this access was notv possible.'
Here is my ABAP:
data: begin of struc,
           counter type i,
           aname type string,
           aname2 type string,
      end of struc.
data: cnt_c type c.
data: itab like table of struc with HEADER LINE,
      xml_string type xstring.
do 3 times.
     move sy-index to: itab-counter, cnt_c.
     concatenate 'nameA' cnt_c into itab-aname.
     concatenate 'nameB' cnt_c into itab-aname2.
     append itab.
enddo.
CALL TRANSFORMATION Z_ST_TEST5
       SOURCE  ROOT = itab
       RESULT XML xml_string.
CALL FUNCTION 'DISPLAY_XML_STRING'
  EXPORTING
    XML_STRING            = xml_string.
skip 1.
and here is my ST:
<?sap.transform simple?>
<tt:transform xmlns:tt="http://www.sap.com/transformation-templates">
  <tt:root name="ROOT"/>
    <tt:template>
     <TABLE>
      <tt:loop ref=".ROOT" name="line">
        <ITEM>
          <counter>
            <tt:value ref="$line.aname" />
          </counter>
          <name>
            <tt:value ref="$line.aname" />
          </name>
          <name2>
            <tt:value ref="$line.aname2" />
          </name2>
        </ITEM>
      </tt:loop>
     </TABLE>
    </tt:template>
</tt:transform>

Answer 1

Figured it out. The interla tables used in teh call transformation statement can never have a header line.