vidhya sankar wrote:
Dear justin,
                  Thank you for your reply,
I want to simultaneously push reference group and pull mobile group or vice versa

In this case, you have no reference group, if you're pulling both of them. You'll have pull_group1 and pull_group2, but no pull_group0. Take note of the warning in the manual about this case.

( here both groups moving in the same direction) . can i do that by which option of pull command either by umbrella or constant_force option


That depends on whether you need to model constant velocity pulling or constant force pulling. You can impart motion using any of the pull types (including constraint), but your specific needs will dictate which of these is most appropriate.

-Justin

--
========================================

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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