[exim] multiple inline routing rules

Hi,
exim-4.32 on Solaris 9
Is there a bug with multiple inline routing rules?
I get an error for the following router which I was expecting to work :

smart_route:
driver = manualroute
#domains = !+local_domains
transport = remote_smtp
hosts_randomize
route_list = cambridge.org mailserver1.cup.cam.ac.uk: \
          mailserver2.cup.cam.ac.uk

bash-2.05# /usr/exim/bin/exim -v -bt dkoutsos@???
LOG: MAIN
Error in smart_route router: unknown routing option or transport name
"mailserver2.cup.cam.ac.uk"
dkoutsos@??? cannot be resolved at this time:
error in router: unknown routing option or transport name
"mailserver2.cup.cam.ac.uk"