# Error after restarting: particles communicated to PME rank 0 are more than 2/3 times the cut-off **URL:** \ **Category:** User discussions\ **Tags:** mdrun, mdrun-crash\ **Created:** [May 27, 2021, 10:46am UTC](https://gromacs.bioexcel.eu/t/error-after-restarting-particles-communicated-to-pme-rank-0-are-more-than-2-3-times-the-cut-off/2231 "2021-05-27T10:46:47Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![rcrehuet](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/rcrehuet/32/340_2.png) [@rcrehuet](https://gromacs.bioexcel.eu/u/rcrehuet)\ **Post date:** [May 27, 2021, 10:46am UTC](https://gromacs.bioexcel.eu/t/error-after-restarting-particles-communicated-to-pme-rank-0-are-more-than-2-3-times-the-cut-off/2231/1 "2021-05-27T10:46:47Z")
GROMACS version: 2019.4 GROMACS modification: with plumed Dear all, My simulation has crashed with the following error: ``` ------------------------------------------------------- Program: gmx mdrun, version 2019.4 Source file: src/gromacs/ewald/pme-redistribute.cpp (line 282) MPI rank: 0 (out of 6) Fatal error: 789 particles communicated to PME rank 0 are more than 2/3 times the cut-off out of the domain decomposition cell of their charge group in dimension x. This usually means that your system is not well equilibrated. ``` The problem is the simulation has been running for 263400000 steps (526800 ps), after an NVT and NPT equilibration. So I do not think the problem is the system is not well equilibrated. Curiously the error appeared just after restarting from a checkpoint file. Could this be related to the problem? The run had been restarted several times before without problems. If so, is there anything I can check or do to solve the error? Best regards, Ramon