Vxyowsup traceback

vxyowsup.trace

File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/vxyowsup/whatsapp.py", line 154, in send_to_human
            self.toLower(msg)
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/layers/__init__.py", line 59, in toLower
            self.__lower.send(data)
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/layers/__init__.py", line 164, in send
            s.send(data)
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/layers/__init__.py", line 107, in send
            send(entity)
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/layers/protocol_messages/layer.py", line 15, in sendMessageEntity
            self.entityToLower(entity)
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/layers/__init__.py", line 111, in entityToLower
            self.toLower(entity.toProtocolTreeNode())
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/layers/__init__.py", line 59, in toLower
            self.__lower.send(data)
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/layers/logger/layer.py", line 8, in send
            logger.debug("tx:\n%s" % ldata)
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/structs/protocoltreenode.py", line 81, in __str__
            return self.toString()
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/structs/protocoltreenode.py", line 73, in toString
            out += c.toString()
          File "/var/praekelt/vumi-go/ve/local/lib/python2.7/site-packages/yowsup/structs/protocoltreenode.py", line 69, in toString
            out += "\nHEX:%s\n" % binascii.hexlify(self.data)
        exceptions.UnicodeEncodeError: 'ascii' codec can't encode character u'\u2013' in position 105: ordinal not in range(128)