fails to get atoms from snapshot (dump) into simulation

Dear All!

I am struggling a bit with reading data from an existing (clear text) dump file (ITEM: ATOMS id type x y z vx vy vz c_ke c_pe fx fy fz q) into a simulation. After reading the data (read_dump data.old 1000 x y z vx vy vz box yes replace yes) LAMMPS tells me it has read X atoms, but when I run the simulation the run contains 0 atoms again. The initially created box is replaced by the correct box from the data.old file)

So in short, the dump file contains all atoms and the box size, they are apparently read correctly, but then during the simulation no atoms are present, and I do not see where I ¡°lost¡± them.

Data.old:

ITEM: TIMESTEP

1000000

ITEM: NUMBER OF ATOMS

181760

ITEM: BOX BOUNDS pp pp ff

0 252.28

0 252.28

0 60

ITEM: ATOMS id type x y z vx vy vz c_ke c_pe fx fy fz q

1 2 0 0 0.973 0 0 0 0 -2.786 0 0 0 0.0364858

2 2 3.60399 0 0.973 0 0 0 0 -2.76864 0 0 0 0.0371448

3 2 7.20798 0 0.973 0 0 0 0 -2.78273 0 0 0 0.0370445

[¡¦]

read_dump data.old 1000000 id type x y z vx vy vz box yes replace yes

and the log says:

read_dump data.old 1000000 x y z vx vy vz box yes replace yes

orthogonal box = (0 0 0) to (252.28 252.28 60)

0 atoms before read

181760 atoms in snapshot

[¡¦]

Every hint is very welcome!

Yours,

Chris

Dear All!

I am struggling a bit with reading data from an existing (clear text) dump
file (ITEM: ATOMS id type x y z vx vy vz c_ke c_pe fx fy fz q) into a
simulation. After reading the data (read_dump data.old 1000 x y z vx
vy vz box yes replace yes) LAMMPS tells me it has read X atoms, but when I
run the simulation the run contains 0 atoms again. The initially created box
is replaced by the correct box from the data.old file)

please have a careful look at the read_dump command documentation. its
primary purpose is to overwrite atom data for existing atoms. the
documentation explains how atoms are matched. obviously, it found no
existing atoms that matched those in the dump file.

axel.