Pair dpd requires ghost atoms store velocity (../pair_dpd.cpp:251)

Hi All,
I am trying to use dpd thermostat to heat up my surface, and then to keep the temperature constant. I got an error "Pair dpd requires ghost atoms store velocity (../pair_dpd.cpp:251)" and I do not know what does it mean. What should i do to solve the problem.
Thanks,
Rose

Have you used "comm_modify vel yes" command as stated in the manual?