chelpg charge calculation in gaussian

From: Dongchul Lim <lim-0at0-omega.chem.yale.edu>
Subject: chelpg charge calculation in gaussian
Date: Fri, 16 Oct 92 11:21:10 EDT
 (I sent the same question to help-0at0-gaussian.com. Gaussian people
 don't need to answer.)
 In the calculation of chelpg charges with Gaussian 92 program,
 as someone suggested, I increased the number of points to fit
 in chelpg charge calculation by stating "IOP(6/42=n)" in
 route card. I was able to increase n up to 3. Beyond that,
 the gaussian program died leaving the following message:
 (We're running IRIX 4.0.1 on SGI 4D/35 with 16Mb memory)
   Breneman (CHELPG) radii used for charge fitting
   Generate Potential Derived Charges using the Brenneman model, NDens= 4.
   Grid spacing= 0.189 Box extension= 2.800
   NStep X,Y,Z=   51     53     39   Total possible points=      105417
    Too many points to fit, reduce NDens.
   Error termination in Lnk1e.
 I wonder how many points are "too many".
 Also I want to know how I can get symmetric charge distribution
 for symmetric molecules. For example, the follwing molecule has
 C2v symmetry and I guess atomic charges must be symmetrical when
 a reasonable number of points to fit are used. Is there any other
 way to get symmetric charges other than increasing the number of
 points, e.g., by using sort of symmetry option?
 Thank you very much.
 -DCL
 ****************** cyclopentadiene.com ***********************
 %MEM=4000000
 #N 6-31G* SCF=(TIGHT,DIRECT) NAME=LIM POP=CHELPG IOP(6/42=4)
 Cyclopentadiene (C2v) 6-31G*//3-21G Single Point Calculation
 0 1
  C
  C   1      R2
  C   1      R2        2      A3
  C   2      R4        1      A4         3      D4           0
  C   3      R4        1      A4         2      D4           0
  H   1      R6        3      A6         2      D6           0
  H   1      R6        3      A6         2     -D6           0
  H   2      R8        1      A8         4      D8           0
  H   3      R8        1      A8         5      D8           0
  H   5      R10       3      A10        4      D10          0
  H   4      R10       2      A10        5      D10          0
       Variables:
  R2          1.51920200
  R4          1.32927300
  R6          1.08656800
  R8          1.06880300
  R10         1.06908200
  A3        102.10308600
  A4        109.65329900
  A6        111.61262822
  A8        123.42611300
  A10       126.56346320
  D6       -119.34690620
       Constants:
  D4          0.00000000
  D8        180.00000000
  D10       180.00000000
 **************************************************************
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 * Dongchul Lim                   | Phone (203) 432-6288            *
 * Dept. of Chemistry, Yale Univ. | Email: lim-0at0-rani.chem.yale.edu   *
 * 225 Prospect Street            |            (130.132.25.60)      *
 * New Haven, CT 06511            |                                 *
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