read_data error

Hello,

I am trying to simulate a polymer in lammps and I am getting an error message with the read_data command. Attached is a copy of my input file that I’m trying to have lammps read. I have compared my input file with others online that work for polymer simulations and it is very similar so I’m not sure why I am getting an error. Below is the error message:

Reading data file …
orthogonal box = (0 0 0) to (6 6 22)
1 by 1 by 1 MPI processor grid
reading atoms …
0 atoms
ERROR: Unknown identifier in data file: 1 2 1 2.0 2.0 2.0 (…/read_data.cpp:464)

I have developed a python script that generates my input file if that helps. I appreciate the assistance is finding the issue with my input file.

Thanks,

PVDF_Input.txt (8.44 KB)

Hello,

I am trying to simulate a polymer in lammps and I am getting an error
message with the read_data command. Attached is a copy of my input file
that I'm trying to have lammps read. I have compared my input file with
others online that work for polymer simulations and it is very similar so
I'm not sure why I am getting an error. Below is the error message:

​comparing your data file to some other files is not a good way to
ascertain​ your data file is correct.
reading the documentation is. the description of the read_data command
includes a detailed description of the requirements and parsing rules for
processing data files.
for example, that documentation clearly states, that the very first line of
a data file is always ignored. thus LAMMPS will believe that your data file
does not contain any atoms, and thus will not be able to correctly parse
your Atoms sections, which is why you get the error message, that you are
seeing.

axel.

I think type of atoms column should be as second column not at third place.