Unknown fix style

Then I do now know what the problem is. Are you sure that the LAMMPS executable you run is also the one you just (re)compiled that shows that the fix is installed? That is the only thing I can think of that the problem could be.

Dear Stefan,

Let me thank for your kindly attention.

I just found that the RIGID package installed through the command “make package-status”.

But when I checked the “Fix styles” via the command “lmp_serial -h” , There is not rigid or shake into.

actually, I installed all the packages but the rigid is not installed.

What about this matter?

Many thanks

Dear Stefan,

Let me thank for your kindly attention.
I just found that the RIGID package installed through the command "make
package-status".
But when I checked the "Fix styles" via the command "lmp_serial -h" , There
is not rigid or shake into.
actually, I installed all the packages but the rigid is not installed.

What about this matter?

people have already told you *multiple* times, that after "installing"
a package, you have to compile a new executable. the installation only
copies the sources, but doesn't update the executable. this is all
explained in the manual.

please make an effort to debug and solve problems by yourself and take
the advice given to you more seriously and pay more attention to it.
your behavior in this discussion is showing a serious lack of respect
for the time other people spend to help you. if you stick to your
attitude you will not only end up with not getting any help for
serious problems (and not trivial ones that you are currently have),
but also will needlessly frustrate people trying to help and take away
their motivation to help anybody, including those that do show the
proper respect.

axel.

Did you recompile lammps after installing the package?

You can do so by issuing "make serial" at the command line, from the src
directory.

Pierre