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qasd

木虫 (著名写手)

[交流] 【讨论】是MS 4.2有bug还是我的设置有问题?

建立一个水的模型。用cvff力场分配力场参数,H*,O*
然后用Amorphous Cell模块construction,例如100个
construction后修改截断为5,然后对盒子里面的水无论是单点能,能量最小化还是动力学计算都报错,这是怎么回事?换compass或者pcff都可以正常计算。
错误信息如下
FORCEFIELD OPTIONS
__________________

Filename                  : cvff.frc
Definition name                  : cvff_nocross_nomorse
Version                          : 2.4
Last modification date          : 3/1/2
# of automatic parameters : 0

NONBOND ENERGY CUTOFFS
______________________

                Cutoff (A)        Spline Width (A)        Buffer Width (A)

vdW                  8.50                     1.00                     0.50
Coulomb                   --                       --                       --

NONBOND ENERGY CMM PARAMETERS
_____________________________

            Number of Cells          Update Width (A)

Coulomb                1                        1.00

Summation method for vdW        : Atom based
Summation method for Coulomb        : Cell multipole
Dielectric                        : 1.00
Warning: Energy: The CMM may not work for systems with less than 200 atoms.
Warning: Energy: If so, the Ewald method is suggested.
Error: tensor element equals to 0 for a divide operation
    while executing
"vector temp divide $temp $nb_Bij"
    invoked from within
"if {$combination == "sixth_power"} {

    vector ones fill 1.0 $nType
    vector ones vectorTranspose $ones

    vector nb_r vectorTranspose $nb_r
    ..."
    (procedure "baseTailCorrection" line 55)
    invoked from within
"baseTailCorrection $vdWTail(cutoff)"
    invoked from within
"if {![info exists vdWTail(energy)]} {
    set vdWTail(cutoff) $r_cutoff
    baseTailCorrection $vdWTail(cutoff)
  } else {
    if {$r_cutoff != $vdWTa ..."
    (procedure "fullTailCorrection" line 22)
    invoked from within
"fullTailCorrection $cutoff_onoffsw $printOnly"
    invoked from within
"if {!$printOnly} {
    fullTailCorrection $cutoff_onoffsw $printOnly
    puts "NOTE: Pressure and energy tail corrections will be added to all subsequ ..."
    (procedure "vdWTailCorrection" line 65)
    invoked from within
"vdWTailCorrection 8.50"

Total time used by DISCOVER: 0.58 secs

[ Last edited by qasd on 2008-5-22 at 12:24 ]
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