ERROR:tryton.common.common:Traceback (most recent call last):
  File "/trytond/protocols/jsonrpc.py", line 123, in _marshaled_dispatch
    response['result'] = dispatch_method(method, params)
  File "/trytond/protocols/jsonrpc.py", line 156, in _dispatch
    res = dispatch(*args)
  File "/trytond/protocols/dispatcher.py", line 158, in dispatch
    result = rpc.result(meth(*c_args, **c_kwargs))
  File "/trytond/model/modelview.py", line 506, in wrapper
    return func(cls, *args, **kwargs)
  File "/trytond/model/workflow.py", line 33, in wrapper
    result = func(cls, filtered, *args, **kwargs)
  File "/trytond/modules/account_invoice/invoice.py", line 1294, in post
    invoice.print_invoice()
  File "/trytond/modules/account_invoice/invoice.py", line 1197, in print_invoice
    InvoiceReport.execute([self.id], {})
  File "/trytond/modules/account_invoice/invoice.py", line 2335, in execute
    res = super(InvoiceReport, cls).execute(ids, data)
  File "/trytond/report/report.py", line 131, in execute
    type, data = cls.parse(action_report, records, data, {})
  File "/trytond/modules/account_invoice/invoice.py", line 2364, in parse
    localcontext)
  File "/trytond/report/report.py", line 287, in parse
    data = cls.unoconv(data, report.template_extension, output_format)
  File "/trytond/report/report.py", line 307, in unoconv
    raise Exception(stderrdata)
Exception: None