dynamic group Error: Illegal group command

Deal all

I have this error when I define my desired group as the following:

region b block INF INF INF INF 71.5 88.5

group B dynamic all region b

I would be grateful if I have your comment to solve this error

Deal all

I have this error when I define my desired group as the following:

region b block INF INF INF INF 71.5 88.5
group B dynamic all region b

I would be grateful if I have your comment to solve this error

there is no error when these two lines are executed with the current
version of LAMMPS.

I am wondering which lammps versions support group dynamic command

I am wondering which lammps versions support group dynamic command in addition to the current version.

I am wondering which lammps versions support group dynamic command in
addition to the current version.

if you are upgrading, why not to the current version? it has lots of
bugfixes, too, that older versions don't have.
all known problems with the current version (which is also the latest
"stable" version, btw) are with experimental or very new features.
i have a small collection of additional bugfixes that have been
accumulated over the last four weeks, but they have a very minimal
impact and are generally difficult to trigger.

axel.

oh, and the feature and bugfix history of LAMMPS is documented here:

http://lammps.sandia.gov/bug.html

and the corresponding files for the previous years.