<div dir="ltr">Hi, my post concerns the problem that the value of the global seed does not affect the initialization of the parallel random number generator that is used for the Wiener process in the Langevin ensemble. For cp2k version 4.1, the first particle-specific seed is set in line 95 of motion/wiener_process.F by calling next_rng_seed() without arguments, thus resulting in 12345.0. I observed (using version 2.4) that setups that differed only in their initial velocities showed strong correlations among each other in their dynamics after a short time, which I would attribute to the noise term being de facto not random. A similar issue for MC calculations has been posted in this forum before (subject "Seed numbers bug in MC") and the problem has been solved in version 4.1 by specifying last_rng_stream=force_env_1%globenv%gaussian_rng_stream. Could you fix this problem for the Wiener process as well? Thanks, Valentin </div>