def preIteration(self, iterationresults, hdf5):
        """
        Every iteration, send the motors updated positions.
        """
        if self.enable:
            msg = ''
            try:
                for i in self.motors:
                    i.update()
            except Exception as e:
                logger.error('Problem updating Vaunix:\n{}\n{}\n'.format(msg, e))
                self.isInitialized = False
                raise PauseError