ERROR: Atoms moving too fast; simulation has become unstable (2 atoms on patch 42 pe 18).

From: Mi Yang (drmiyang2019_at_gmail.com)
Date: Sat Dec 19 2020 - 08:07:11 CST

Please if anyone has time. Kindly comment on error:

LDB: ============= START OF LOAD BALANCING ============== 427.397
LDB: ============== END OF LOAD BALANCING =============== 427.397
Info: useSync: 0 useProxySync: 0
LDB: =============== DONE WITH MIGRATION ================ 427.398
LDB: ============= START OF LOAD BALANCING ============== 427.472
LDB: Largest compute 91 load 0.012960 is 20.1% of average load 0.064504
LDB: Average compute 0.001270 is 2.0% of average load 0.064504
LDB: TIME 427.473 LOAD: AVG 0.0645037 MAX 0.0740106 PROXIES: TOTAL 268
MAXPE 13 MAXPATCH 7 None MEM: 3701.54 MB
LDB: TIME 427.473 LOAD: AVG 0.0645037 MAX 0.0740106 PROXIES: TOTAL 293
MAXPE 16 MAXPATCH 10 RefineTorusLB MEM: 3701.54 MB
LDB: TIME 427.474 LOAD: AVG 0.0645037 MAX 0.0670093 PROXIES: TOTAL 295
MAXPE 16 MAXPATCH 10 RefineTorusLB MEM: 3701.54 MB
LDB: ============== END OF LOAD BALANCING =============== 427.475
Info: useSync: 0 useProxySync: 0
LDB: =============== DONE WITH MIGRATION ================ 427.476
ERROR: Atom 22221 velocity is -14189.9 27.0305 6562.5 (limit is 10000, atom
777 of 999 on patch 42 pe 18)
ERROR: Atom 4063 velocity is 17381.5 -1472.13 -10044 (limit is 10000, atom
997 of 999 on patch 42 pe 18)
ERROR: Atoms moving too fast; simulation has become unstable (2 atoms on
patch 42 pe 18).
FATAL ERROR: Low global exclusion count! (89972 vs 89977) System unstable
or pairlistdist or cutoff too small.

FATAL ERROR: See http://www.ks.uiuc.edu/Research/namd/bugreport.html
[0] Stack Traceback:
  [0:0] [0x20094910]
  [0:1] [0x204abb66]
  [0:2] [0x204b3616]
  [0:3] [0x204a1a42]
  [0:4] [0x20c01e60]
  [0:5] [0x21132c80]

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