Error with meam pair-style

LAMMPS LAMMPS General Discussion
1

Dear developers,
I am using windows 29 Aug2024 stable LAMMPs version on an Intel I9 Windows 10 machne 18 cores

when running the following piece of lammps script:

 dimension 3
 boundary p p p
 atom_style atomic
 lattice    diamond 5.43
 region     box block 0 5 0 5 0 40
 create_box    2 box
 create_atoms  2 box
 mass 1 47.867
 mass 2 28.0855
 group Ti   type 1
 group Si   type 2
 pair_style  meam 
 pair_coeff  * * library.meam Ti Si    # Si-Si and Al-Al

I got the following error (in the log file)

 pair_style  meam
 pair_coeff  * * library.meam Ti Si    # Si-Si and Al-Al
ERROR: Incorrect args for pair style meam coefficients (src/MEAM/pair_meam.cpp:204)
Last command:  pair_coeff  * * library.meam Ti Si    # Si-Si and Al-Al

The library.meam file is in the working directory.
I do not understand where the error is ?
Thanks a lot for help
Pascal

2

Please look at the pair style’s documentation. Your pair_coeff command is incomplete.

3

Dear Axel
Yes !! I wrongly thought that NULL stood for a non concerned element.
So it should be (but Ti seems not be in the library, but it is another problem.)

pair_style meam
pair_coeff * * library.meam Ti Si NULL Ti Si

Thanks a lot;
Pascal