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[ccp4bb]: error in simulated_annealing



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I am trying to run simulated annealing with a protein
which has 3 monomers of 330 residues each. When i
try to set the initial temperature something higher than 3000K (like
4000K) I get this error mensage:

------------------------------ cycle=    30
-----------------------------------
 | Etotal =933424.000 grad(E)=3.564      E(BOND)=505.325
E(ANGL)=1842.126   |
 | E(DIHE)=2475.845   E(IMPR)=348.061    E(VDW )=1416.499
E(PVDW)=28.229     |
 | E(NCS )=664.074
E(XREF)=926143.841                                       |
 -------------------------------------------------------------------------------

 FCALC: #scatt.= 7665 #anomalous=  0 #special pos.=  0 occupancies=1
 XFFT: using grid [ 100, 160, 270] and sublattice [ 100( 101), 160(
161),  90]
 XTAREXPR: ->[TEST SET]    monitor=  0.269
 %CHEVAL error encountered: argument out of range
   (CNS is in mode: SET ABORT=NORMal END)
 *****************************************************
 ABORT mode will terminate program execution.
 *****************************************************
 Program will stop immediately.
          ============================================================
           Maximum dynamic memory allocation:    26750936 bytes
           Maximum dynamic memory overhead:          1416 bytes


Is there anysuggestion about the meaning of this error mensage!
THANKS A LOT
===========================================================
 Thiago Rodrigues
 Undergraduated Student at the Brazilian Synchrotron LNLS -
http://www.lnls.br
 Protein Crystallography Group
 Phone +55(19)2874520 / Fax +55(19)2874632