Invalid Atom Style

Dear all

When I run an example in LAMMPS documentary(Lammps/bench), I see follow error:

~/lmp_openmpi <in.chute
LAMMPS (31 Oct 2010)
ERROR: Invalid atom style

Why?
Thanks a lot.
Meisam

DId you compile LAMMPS with the GRANULAR package?

If you didn’t, you’ll get that message.

—AEI

Atom style format is wrong as the error message says, seems to be self-explanatory?

I downloaded Lammps and installed it, and didn’t install special package such as granular package.
Should I have done it?

I downloaded Lammps and installed it, and didn't install special package
such as granular package.
Should I have done it?

yes.

how come that your lammps version says
october 2010, when you just downloaded it?

if you install lammps from scratch, you should
install the up-to-date version.

also, if you want to do granular simulations,
you might be better off using LIGGGHTS, a
derivative of LAMMPS which has many
enhancements for granular systems over
the granular support package in
LAMMPS itself.

axel.

I downloaded Lammps and installed it, and didn’t install special package
such as granular package.
Should I have done it?

yes.

how come that your lammps version says
october 2010, when you just downloaded it?

if you install lammps from scratch, you should
install the up-to-date version.

Should I install up-to-date version of LAMMPS, because version of october 2010 dose not support granular system?

also, if you want to do granular simulations,
you might be better off using LIGGGHTS, a
derivative of LAMMPS which has many
enhancements for granular systems over
the granular support package in
LAMMPS itself.

I found a site for LIGGGHTS, but I couldn’t find option to downloading that software?

I downloaded Lammps and installed it, and didn’t install special package
such as granular package.
Should I have done it?

yes.

how come that your lammps version says
october 2010, when you just downloaded it?

if you install lammps from scratch, you should
install the up-to-date version.

Should I install up-to-date version of LAMMPS, because version of october 2010 dose not support granular system?

No. You should install the up-to-date version because it is the most recent available, and is generally a better and more reliable code than the October 2010 release.

also, if you want to do granular simulations,
you might be better off using LIGGGHTS, a
derivative of LAMMPS which has many
enhancements for granular systems over
the granular support package in
LAMMPS itself.

I found a site for LIGGGHTS, but I couldn’t find option to downloading that software?

You need to register at the LIGGGHTS website. The link is in the bottom-left side of the page. . . .

–AEI

Excuse me for asking many questions. I checked different atom_styles, “peri” and “granular” doesn’t work on my system. How can I install them?

Excuse me for asking many questions. I checked different atom_styles, "peri"
and "granular" doesn't work on my system. How can I install them?

why don't you just read the documentation?

it is all explained there. also, please note that
there can be differences between versions, e.g.
in current LAMMPS versions, the "granular" atom
style has been generalized into a "sphere" atom style.

axel.

Excuse me for asking many questions. I checked different atom_styles, “peri”
and “granular” doesn’t work on my system. How can I install them?

why don’t you just read the documentation?

I read it. But I read documentation of October 2010. I want to know how to install those packages( such as granular) in version of October 2010.

I read it. But I read documentation of October 2010. I want to know how to
install those packages( such as granular) in version of October 2010.

then you read the correct documentation.
just read it again.

in any case, you should seriously consider
downloading and installing the current version,
though. if you run into problems, you'll have
difficulties to get somebody to help you. nobody
will be interested to fix bugs in an obsolete version
and most likely have already been corrected.

axel.