Hi,all:
   Recently, I was running the POL3 bulk water using amber11, though i can pass the minimization, when i run the NVT simulation, something strange happened....         NSTEP =        0   TIME(PS) =       0.000  TEMP(K) =     0.00  PRESS =     0.0 Etot   =    -19178.2762  EKtot   =         0.0000  EPtot      =    -19178.2762 BOND   =         0.0000  ANGLE   =         0.0000  DIHED      =         0.0000 1-4 NB =         0.0000  1-4 EEL =         0.0000  VDWAALS    =      5804.4498 EELEC  =    -18269.6643  EHBOND  =         0.0000  RESTRAINT  =         0.0000 EPOLZ  =     -6713.0617 Dipole convergence: rms =  0.416E-04 iters =   8.00 ------------------------------------------------------------------------------
vlimit exceeded for step      1; vmax =    37.6326vlimit exceeded for step      2; vmax = **********vlimit exceeded for step      3; vmax = **********vlimit exceeded for step      4; vmax = **********vlimit exceeded for step      5; vmax = **********vlimit exceeded for step      6; vmax = **********vlimit exceeded for step      7; vmax = **********
 NSTEP =      100   TIME(PS) =       0.100  TEMP(K) =453529.68  PRESS =     0.0 Etot   =            NaN  EKtot   =   3209352.6744  EPtot      =            NaN BOND   =         0.0000  ANGLE   =         0.0000  DIHED      =         0.0000 1-4 NB =         0.0000  1-4 EEL =         0.0000  VDWAALS    = ************** EELEC  =            NaN  EHBOND  =         0.0000  RESTRAINT  =         0.0000 EPOLZ  =            NaN Dipole convergence: rms =        NaN iters =  21.00 ------------------------------------------------------------------------------
    NSTEP =      200   TIME(PS) =       0.200  TEMP(K) =453529.68  PRESS =     0.0 Etot   =            NaN  EKtot   =   3209352.6744  EPtot      =            NaN BOND   =         0.0000  ANGLE   =         0.0000  DIHED      =         0.0000 1-4 NB =         0.0000  1-4 EEL =         0.0000  VDWAALS    = ************** EELEC  =            NaN  EHBOND  =         0.0000  RESTRAINT  =         0.0000 EPOLZ  =            NaN  Dipole convergence: rms =        NaN iters =  21.00
the energy and temperature are unnormal for all steps except for the first snapshot, my in file(md0.in) is....
polyA-polyT 10-mer:  &cntrl  imin   = 0,  irest  = 0,  ntx    = 1,  ntb    = 1,  cut    = 10,  ntr    = 0,  ntc    = 2,  ntf    = 2,  tempi  = 0.0,  temp0  = 300.0,  tautp =0.5,  ntt    = 3,  gamma_ln = 1.0,  nstlim = 150000, dt = 0.001,  ig = -1,  ntpr = 100, ntwx = 10000, ntwr = 1000  ipol=1, /  &ewald   indmeth=1, skinnb = 1.0, diptau = 9.9, irstdip = 0, /
MY command is :  sander.MPI -O -i md0.in -p pep.parm7 -c min1.rst  -ref min1.rst -rdip 1ubq.rstdip0 -o md0.out -x md0.crd -r md0.rst can anybody tell me the reason? WHAT SHOULD I DO?  thx in advance.PS: the restart file of minimization(min1.rst), the result file of NVT (md0.out)and the parm file(pep.parm7) are in the attachment!
Xiaoxudong.ECNU. 		 	   		  
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Received on Tue Sep 11 2012 - 04:00:03 PDT