unknown command - pair_style meam

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1

Dear Lammps users,

I have installed lammps using the pre-built ubuntu linux executable. However it cannot recognize the pair_style meam command. Does it mean the MEAM package is not included in the pre-built executable? If so, can you please advice me how to install MEAM package with the pre-built ubuntu linux executable?
Thank you so much for your kind help.

Best regards,
Hansinee

2

It probably is not installed in the pre-built version.

My advice is to just compile your own lammps. It’s easy enough if you follow the instructions on the website.

3

The old Fortran implementation "meam" has been superseded by the translated C++ version "meam/c". The old package outputs a warning, the PPA build has dropped it altogether.
Just change your script to "pair_style meam/c" and it should work.

Best regards,
Sebastian Hütter

4

The old Fortran implementation "meam" has been superseded by the
translated C++ version "meam/c". The old package outputs a warning, the PPA
build has dropped it altogether.

​if the PPA build drops the meam​ style, i would suggest to apply the
follow patch to maintain some level of backward compatibility:

diff --git a/src/USER-MEAMC/pair_meamc.h b/src/USER-MEAMC/pair_meamc.h
index 476a70dd0..a006e70bd 100644
--- a/src/USER-MEAMC/pair_meamc.h
+++ b/src/USER-MEAMC/pair_meamc.h
@@ -14,6 +14,7 @@
#ifdef PAIR_CLASS

PairStyle(meam/c,PairMEAMC)
+PairStyle(meam,PairMEAMC)

#else