RML Report no more text output after use setTag

System: OpenERP Version 7.0 on Ubunthu 12.04

If i use setTag in a rml report the text in para tags after setTag will not be shown up in the pdf file.
The only Solution is to use setTag in every following para tag again.

my rml code:
<barCode>
        [[ picking.name and setTag('barCode','barCode',{'code':'Standard39','barHeight':'15.0'}) or removeParentNode('para') ]] [[picking.name]]
    </barCode>

     <para>
      only para before orgin [[picking.origin]] name [[picking.name]]
    </para>

      <para>
       settag para [[picking.name and setTag('para','para')]][[picking.name]]
    </para>

       <para>
      only para after orgin [[picking.origin]] name [[picking.name]]
    </para>

output:
barcode
settag para 123456

expected output:
barcode
only para before ...
settag para 123456
only para after ....