Dear Stefan,
thank you for your quick answer. Actually the system is really small, 10000 atoms more or less.
That’s what I did, I compared langevin ( fix langevin command) thermostat and NH thermostat (fix nvt command) and , in term of pressure, I get a totally different response.
Here the script I am using, with the 2 different thermostats defined:
LG_2 (84.6 KB)
LG_4 (816 KB)
NH_1 (84.7 KB)
NH_3 (84.7 KB)