Traceback (most recent call last):
  File "/trytond/protocols/jsonrpc.py", line 125, in _marshaled_dispatch
    response['result'] = dispatch_method(method, params)
  File "/trytond/protocols/jsonrpc.py", line 158, in _dispatch
    res = dispatch(*args)
  File "/trytond/protocols/dispatcher.py", line 158, in dispatch
    result = rpc.result(meth(*c_args, **c_kwargs))
  File "/trytond/modules/account_invoice/invoice.py", line 2418, in execute
    res = super(InvoiceReport, cls).execute(ids, data)
  File "/trytond/report/report.py", line 128, in execute
    type, data = cls.parse(action_report, records, data, {})
  File "/trytond/modules/account_invoice/invoice.py", line 2447, in parse
    localcontext)
  File "/trytond/report/report.py", line 277, in parse
    data = rel_report(**localcontext).render()
  File "/site-packages/relatorio/templates/base.py", line 34, in render
    return self.serializer(self.events)
  File "/site-packages/relatorio/templates/opendocument.py", line 855, in __call__
    for kind, data, pos in stream:
  File "/site-packages/genshi/core.py", line 289, in _ensure
    for event in stream:
  File "/site-packages/genshi/filters/i18n.py", line 690, in __call__
    for kind, data, pos in stream:
  File "/site-packages/genshi/template/base.py", line 618, in _include
    for event in stream:
  File "/site-packages/genshi/template/markup.py", line 326, in _match
    for event in stream:
  File "/site-packages/genshi/template/base.py", line 592, in _flatten
    yield TEXT, unicode(result), pos
UnicodeDecodeError: 'ascii' codec can't decode byte 0x89 in position 0: ordinal not in range(128)