[lammps-users] How to control the dump steps?

Dear all

      I want to dump only the data after loading, not including equilibration.
      But I find It doesn't dump every timesteps that I set (the dump steps varies).
      Is there some method to control it?
      How get the loading data and discard the equilibration data in my input?

      Thanks in advance!

---------input section-----------
# Load
unfix 1
fix 1 all nve

variable a loop 50
label loop

fix 6 all volume/rescale 100 x 0 $b

dump 2 all custom $m stress.$a sxx
dump 3 all custom $m centro.$a tag centro

run $m

undump 2
undump 3

# equilibration

unfix 6
run $n

next a
jump file.in loop

Best Regards

Zhenyu Yang
  State Key Laboratory of Nonlinear Mechanics (LNM)
  Institute of Mechanics, Chinese Academy of Sciences
  No.15 Beisihuanxi Road
  Beijing 100080, P. R. China
  FAX: 010-62579511
[email protected]...

What steps is it dumping on and what steps do you want it to
be on. Are the steps it is dumping on inconsisten with what
the manual page for the "dump" command says it will dump on?