Can not use template as attachment in field

[sraps (Alistek)]

File "/usr/lib/python2.4/site-packages/openerp-server/service/web_services.py", line 630, in go
    (result, format) = obj.create(cr, uid, ids, datas, context)
  File "/usr/lib/python2.4/site-packages/openerp-server/addons/report_openoffice/report_openoffice.py", line 217, in create
    return fnct(cr, uid, ids, data, report_xml, context)
  File "/usr/lib/python2.4/site-packages/openerp-server/report/report_sxw.py", line 431, in create_source_pdf
    return self.create_single_pdf(cr, uid, ids, data, report_xml, context)
  File "/usr/lib/python2.4/site-packages/openerp-server/addons/report_openoffice/report_openoffice.py", line 166, in

create_single_pdf
    return self.create_relatorio_report(cr, uid, ids, data, report_xml, context=context, output='pdf')
  File "/usr/lib/python2.4/site-packages/openerp-server/addons/report_openoffice/report_openoffice.py", line 87, in

create_relatorio_report
    inzip = zipfile.ZipFile(in_oo)
  File "/usr/lib64/python2.4/zipfile.py", line 210, in __init__
    self._GetContents()
  File "/usr/lib64/python2.4/zipfile.py", line 230, in _GetContents
    self._RealGetContents()
  File "/usr/lib64/python2.4/zipfile.py", line 242, in _RealGetContents
    raise BadZipfile, "File is not a zip file"
BadZipfile: File is not a zip file

Field data is not being converted back from BASE64 encoding.