Hi there,
I'm new to amber and I'm trying to learn how to deal with it....
Within this spirit, I'm trying to perform a MD of an isolated system at 
room temperature, therefore I have chosen to use the variable NTB=0. All 
of the others are common values, I think.
But it isn't working as shows the output:
          -------------------------------------------------------
          Amber 7  SANDER                   Scripps/UCSF 2002
          -------------------------------------------------------
|      Tue Jul 29 15:10:12 2003
  [-O]verwriting output
File Assignments:
|  MDIN: 
md0.in                                                               
| MDOUT: 
md0.out                                                              
|INPCRD: 
alphacd.crd                                                          
|  PARM: 
alphacd.top                                                          
|RESTRT: 
restrt                                                               
|  REFC: 
refc                                                                 
| MDVEL: 
md0.vel                                                              
|  MDEN: 
md0.en                                                               
| MDCRD: 
md0.crd                                                              
|MDINFO: 
mdinfo                                                               
|INPDIP: 
inpdip                                                               
|RSTDIP: 
rstdip                                                               
 Here is the input file:
# IMIN -> tipo de 
simulacao                                                   
# NTX, IREST -> nature and format of 
input                                    
# NTWX, NTWV, NTWE, NTWR, NTPR -> nature ando format of 
output                
# NTB -> Periodic 
boundary                                                    
# NSTLIM, NSCM -> MD run 
flags                                                
# NTT, TEMP0, TAUTP -> Temperature 
regulation                                 
# NTC -> 
Shake                                                                
                                                                               
alpha-ciclodextrina isolada a temperatura ambiente 
(equilibracao)             
 &cntrl                                                                        
    IMIN=0, IREST=0, 
NTX=1,                                                   
    NTWX=50, NTWV=50, 
NTWR=50,                                                
    NTWE=50, 
NTPR=50,                                                         
    
NSTLIM=5000,                                                              
    NTB=0, 
NSCM=100,                                                          
    
NTC=1,                                                                    
    NTT=1, TEMP0=298.15, 
TAUTP=1.0,                                           
 &end                                                                          
                                                                               
                                                                               
--------------------------------------------------------------------------------
   1.  RESOURCE   USE:
--------------------------------------------------------------------------------
| 
Flags:                                                                        
|    NONPERIODIC   ntb=0 and igb=0: Setting up nonperiodic simulation
| New format PARM file being parsed.
| Version =    1.000 Date = 06/17/03 Time = 17:07:40
 NATOM  =     126 NTYPES =       6 NBONH =      60 MBONA  =      65
 NTHETH =     134 MTHETA =      90 NPHIH =     287 MPHIA  =     192
 NHPARM =       0 NPARM  =       0 NNB   =     661 NRES   =       1
 NBONA  =      65 NTHETA =      90 NPHIA =     192 NUMBND =       6
 NUMANG =      11 NPTRA  =      12 NATYP =       6 NPHB   =       0
 IFBOX  =       0 NMXRS  =     126 IFCAP =       0 NEXTRA =       0
|     Memory Use     Allocated         Used
|     Real             2000000         9471
|     Hollerith         400000          759
|     Integer          2000000       418848
|     Max Nonbonded Pairs: 5400000
| Duplicated    0 dihedrals
| Duplicated    0 dihedrals
--------------------------------------------------------------------------------
   2.  CONTROL  DATA  FOR  THE  RUN
--------------------------------------------------------------------------------
ACD                                                                             
General flags:
     imin    =       0, nmropt  =       0
Nature and format of input:
     ntx     =       1, irest   =       0, ntrx    =       1
Nature and format of output:
     ntxo    =       1, ntpr    =      50, ntrx    =       1, ntwr    
=      50
     iwrap   =       0, ntwx    =      50, ntwv    =      50, ntwe    
=      50
     ioutfm  =       0, ntwprt  =       0, idecomp =       0, 
rbornstat=      0
Potential function:
     ntf     =       1, ntb     =       0, igb     =       0, nsnb    
=      25
     ipol    =       0, gbsa    =       0
     dielc   =   1.00000, cut     =   8.00000, intdiel =   1.00000
     scnb    =   2.00000, scee    =   1.20000
Frozen or restrained atoms:
     ibelly  =       0, ntr     =       0
Molecular dynamics:
     nstlim  =    5000, nscm    =     100, nrespa  =       1
     t       =   0.00000, dt      =   0.00100, vlimit  =  20.00000
Temperature regulation:
     ig      =   71277, ntt     =       1, vrand   =       0
     temp0   = 298.15000, tempi   =   0.00000, heat    =   0.00000
     dtemp   =   5.00000, tautp   =   1.00000
--------------------------------------------------------------------------------
   3.  ATOMIC COORDINATES AND VELOCITIES
--------------------------------------------------------------------------------
ACD                                                                             
 begin time read from input coords =     0.000 ps
 Number of triangulated 3-point waters found:        0
     Sum of charges from parm topology file =   0.00200000
     Forcing neutrality...
--------------------------------------------------------------------------------
   4.  RESULTS
--------------------------------------------------------------------------------
 ---------------------------------------------------
     eedmeth=4: Setting switch to one everywhere
 ---------------------------------------------------
| Local SIZE OF NONBOND LIST =       5578
| TOTAL SIZE OF NONBOND LIST =       5578
 NSTEP =      0 TIME(PS) =     0.000  TEMP(K) =     0.00  PRESS =     0.0
 Etot   =          nan  EKtot   =       0.0000  EPtot      =          nan
 BOND   =       4.0519  ANGLE   =          nan  DIHED      =      73.9878
 1-4 NB =      23.5207  1-4 EEL =     619.4757  VDWAALS    =   59562.8837
 EELEC  =    -389.5910  EHBOND  =       0.0000  RESTRAINT  =       0.0000
 ------------------------------------------------------------------------------
 vlimit exceeded for step  0; vmax =   93.6575435
 vlimit exceeded for step  1; vmax =   20.5330838
 vlimit exceeded for step  2; vmax =   8790956.85
 vlimit exceeded for step  3; vmax =   3218.44947
 vlimit exceeded for step  4; vmax =   186.852475
 vlimit exceeded for step  5; vmax =   281.72415
 vlimit exceeded for step  6; vmax =   305.697176
 vlimit exceeded for step  7; vmax =   302.390465
 vlimit exceeded for step  8; vmax =   221.471003
 vlimit exceeded for step  9; vmax =   178.076931
 vlimit exceeded for step  10; vmax =   173.338029
 vlimit exceeded for step  11; vmax =   434.991607
 vlimit exceeded for step  12; vmax =   147.34334
 vlimit exceeded for step  13; vmax =   80.8046939
 vlimit exceeded for step  14; vmax =   80.5587922
 vlimit exceeded for step  15; vmax =   1471.60039
 vlimit exceeded for step  16; vmax =   80.0696426
 vlimit exceeded for step  17; vmax =   79.8330323
 vlimit exceeded for step  18; vmax =   79.6017966
 vlimit exceeded for step  19; vmax =   79.3746615
 vlimit exceeded for step  20; vmax =   79.1385957
 vlimit exceeded for step  21; vmax =   78.8850897
 vlimit exceeded for step  22; vmax =   78.5758855
 vlimit exceeded for step  23; vmax =   78.2741297
 vlimit exceeded for step  24; vmax =   77.9481826
 vlimit exceeded for step  25; vmax =   85.172779
 vlimit exceeded for step  26; vmax =   77.2745741
 vlimit exceeded for step  27; vmax =   76.9446935
 vlimit exceeded for step  28; vmax =   76.627078
 vlimit exceeded for step  29; vmax =   3397.81899
 vlimit exceeded for step  30; vmax =   76.0964907
 vlimit exceeded for step  31; vmax =   75.9137909
 vlimit exceeded for step  32; vmax =   75.8097905
 vlimit exceeded for step  33; vmax =   75.7734782
 vlimit exceeded for step  34; vmax =   75.7649366
 vlimit exceeded for step  35; vmax =   75.7567528
 vlimit exceeded for step  36; vmax =   75.7495732
 vlimit exceeded for step  37; vmax =   75.7434868
 vlimit exceeded for step  38; vmax =   73488.7837
 vlimit exceeded for step  39; vmax =   75.7328433
 vlimit exceeded for step  40; vmax =   75.7284959
 vlimit exceeded for step  41; vmax =   75.7245491
 vlimit exceeded for step  42; vmax =   775.454355
 vlimit exceeded for step  43; vmax =   75.7162903
 vlimit exceeded for step  44; vmax =   75.711727
 vlimit exceeded for step  45; vmax =   75.7068749
 vlimit exceeded for step  46; vmax =   75.7020602
 vlimit exceeded for step  47; vmax =   75.6975821
 vlimit exceeded for step  48; vmax =   75.6935556
 vlimit exceeded for step  49; vmax =   75.6901533
 NSTEP =     50 TIME(PS) =     0.050  TEMP(K) =      nan  PRESS =     0.0
 Etot   =          nan  EKtot   =          nan  EPtot      =          nan
 BOND   =  193318.0575  ANGLE   =          nan  DIHED      =     116.9248
 1-4 NB =    2425.1376  1-4 EEL =     420.0159  VDWAALS    =    8453.2431
 EELEC  =    -170.1844  EHBOND  =       0.0000  RESTRAINT  =       0.0000
 ------------------------------------------------------------------------------
 vlimit exceeded for step  50; vmax =   83.3956481
 vlimit exceeded for step  51; vmax =   75.6851903
 vlimit exceeded for step  52; vmax =   75.6834912
 vlimit exceeded for step  53; vmax =   75.6818567
 vlimit exceeded for step  54; vmax =   160.110583
 vlimit exceeded for step  55; vmax =   75.6798846
 vlimit exceeded for step  56; vmax =   75.6798899
 vlimit exceeded for step  57; vmax =   413.502874
 vlimit exceeded for step  58; vmax =   282.051973
 vlimit exceeded for step  59; vmax =   75.679949
 vlimit exceeded for step  60; vmax =   75.6799745
 vlimit exceeded for step  61; vmax =   75.6800103
 vlimit exceeded for step  62; vmax =   76.451566
 vlimit exceeded for step  63; vmax =   75.680118
 vlimit exceeded for step  64; vmax =   75.6801905
 vlimit exceeded for step  65; vmax =   75.6802722
 vlimit exceeded for step  66; vmax =   99.9119017
 vlimit exceeded for step  67; vmax =   107.599584
 vlimit exceeded for step  68; vmax =   75.680529
 vlimit exceeded for step  69; vmax =   75.6806056
 vlimit exceeded for step  70; vmax =   75.6806739
 vlimit exceeded for step  71; vmax =   75.6807332
 vlimit exceeded for step  72; vmax =   75.6807842
 vlimit exceeded for step  73; vmax =   2198.5185
 vlimit exceeded for step  74; vmax =   75.680913
 vlimit exceeded for step  75; vmax =   75.6810012
 vlimit exceeded for step  76; vmax =   75.6811096
 vlimit exceeded for step  77; vmax =   75.6812408
 vlimit exceeded for step  78; vmax =   114.163678
 vlimit exceeded for step  79; vmax =   75.6815795
 vlimit exceeded for step  80; vmax =   75.6627231
 Frac coord min, max:  -0.00356895655  0.680901547
 The system has extended beyond
     the extent of the virtual box.
 Restarting sander will recalculate
    a new virtual box with 30 Angstroms
    extra on each side, if there is a
    restart file for this configuration.
 EWALD BOMB in subroutine Routine: map_coords (ew_force.f)
 Atom out of bounds. If a restart has been written,
 restarting should resolve the error
I do what the program asks and use the "-c restrt" option in sander and 
change "NTX=5" and "IREST=1" in md0.in file, and it keeps falling in the 
same errors until the output turns to be:
          -------------------------------------------------------
          Amber 7  SANDER                   Scripps/UCSF 2002
          -------------------------------------------------------
|      Tue Jul 29 15:17:29 2003
  [-O]verwriting output
File Assignments:
|  MDIN: 
md0.in                                                               
| MDOUT: 
md0.out                                                              
|INPCRD: 
restrt                                                               
|  PARM: 
alphacd.top                                                          
|RESTRT: 
restrt                                                               
|  REFC: 
refc                                                                 
| MDVEL: 
md0.vel                                                              
|  MDEN: 
md0.en                                                               
| MDCRD: 
md0.crd                                                              
|MDINFO: 
mdinfo                                                               
|INPDIP: 
inpdip                                                               
|RSTDIP: 
rstdip                                                               
 Here is the input file:
# IMIN -> tipo de 
simulacao                                                   
# NTX, IREST -> nature and format of 
input                                    
# NTWX, NTWV, NTWE, NTWR, NTPR -> nature ando format of 
output                
# NTB -> Periodic 
boundary                                                    
# NSTLIM, NSCM -> MD run 
flags                                                
# NTT, TEMP0, TAUTP -> Temperature 
regulation                                 
# NTC -> 
Shake                                                                
                                                                               
alpha-ciclodextrina isolada a temperatura ambiente 
(equilibracao)             
 &cntrl                                                                        
    IMIN=0, IREST=1, 
NTX=5,                                                   
    NTWX=50, NTWV=50, 
NTWR=50,                                                
    NTWE=50, 
NTPR=50,                                                         
    
NSTLIM=5000,                                                              
    NTB=0, 
NSCM=100,                                                          
    
NTC=1,                                                                    
    NTT=1, TEMP0=298.15, 
TAUTP=1.0,                                           
 &end                                                                          
                                                                               
                                                                               
--------------------------------------------------------------------------------
   1.  RESOURCE   USE:
--------------------------------------------------------------------------------
| 
Flags:                                                                        
|    NONPERIODIC   ntb=0 and igb=0: Setting up nonperiodic simulation
| New format PARM file being parsed.
| Version =    1.000 Date = 06/17/03 Time = 17:07:40
 NATOM  =     126 NTYPES =       6 NBONH =      60 MBONA  =      65
 NTHETH =     134 MTHETA =      90 NPHIH =     287 MPHIA  =     192
 NHPARM =       0 NPARM  =       0 NNB   =     661 NRES   =       1
 NBONA  =      65 NTHETA =      90 NPHIA =     192 NUMBND =       6
 NUMANG =      11 NPTRA  =      12 NATYP =       6 NPHB   =       0
 IFBOX  =       0 NMXRS  =     126 IFCAP =       0 NEXTRA =       0
     Static Integer Memory requirement of: 2412704  exceeds MAXINT of 
2000000
|     Memory Use     Allocated         Used
|     Real             2000000        10412
|     Hollerith         400000          759
|     Integer          2000000      2412704
|     Max Nonbonded Pairs: 5400000
  ** Redimension and recompile
What is wrong?? I'd appreciate any help....
Thanks in advance,
Herbert
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Received on Tue Jul 29 2003 - 19:53:00 PDT