On 8/10/2011 12:35 AM, Chunxia Gao wrote:
Dear all,

  I generated the molecule topology from antechamber and then coverted to 
gromcas topology.

When I tried to use grompp first it gave me this error : there is no such molecule type 
SOL, so I checked the topology file and found out there was no #include  
"tip3p.itp" . so I added this to the topology file,
so the topology file looked like this:


; oht.top created by rdparm2gmx.pl Thu Oct  6 22:24:42 IST 2011

[ defaults ]
; nbfunc        comb-rule       gen-pairs       fudgeLJ fudgeQQ
1               2               yes             0.5     0.8333

[ atomtypes ]
;name  bond_type    mass    charge   ptype          sigma      epsilon
c3            c3      0.0000  0.0000  A   3.39967e-01  4.57730e-01
h1            h1      0.0000  0.0000  A   2.47135e-01  6.56888e-02
cf            cf      0.0000  0.0000  A   3.39967e-01  3.59824e-01
ha            ha      0.0000  0.0000  A   2.59964e-01  6.27600e-02
ca            ca      0.0000  0.0000  A   3.39967e-01  3.59824e-01
ho            ho      0.0000  0.0000  A   0.00000e+00  0.00000e+00
ce            ce      0.0000  0.0000  A   3.39967e-01  3.59824e-01
os            os      0.0000  0.0000  A   3.00001e-01  7.11280e-01
hc            hc      0.0000  0.0000  A   2.64953e-01  6.56888e-02
oh            oh      0.0000  0.0000  A   3.06647e-01  8.80314e-01
n3            n3      0.0000  0.0000  A   3.25000e-01  7.11280e-01

[ moleculetype ]
; Name            nrexcl
solute             3

[ atoms ]
;   nr       type  resnr residue  atom   cgnr     charge       mass  typeB    
chargeB
      1         c3      1    OHT    C10      1   -0.08830  12.000000
      2         c3      1    OHT     C9      2   -0.04620  12.000000
      3         ce      1    OHT     C8      3   -0.04600  12.000000
      4         ca      1    OHT    C11      4   -0.05100  12.000000
      5         ca      1    OHT    C16      5   -0.11090  12.000000
      6         ca      1    OHT    C15      6   -0.12900  12.000000
      7         ca      1    OHT    C14      7   -0.12960  12.000000
      8         ca      1    OHT    C13      8   -0.13230  12.000000
      9         ca      1    OHT    C12      9   -0.12440  12.000000
     10         cf      1    OHT     C7     10    0.00410  12.000000
     11         ca      1    OHT     C1     11   -0.08660  12.000000
     12         ca      1    OHT     C2     12   -0.07710  12.000000
     13         ca      1    OHT     C3     13   -0.15850  12.000000
     14         ca      1    OHT     C4     14    0.12410  12.000000
     15         oh      1    OHT     O4     15   -0.49780  16.000000
     16         ca      1    OHT     C5     16   -0.21770  12.000000
     17         ca      1    OHT     C6     17   -0.08360  12.000000
     18         ca      1    OHT    C17     18   -0.09110  12.000000
     19         ca      1    OHT    C18     19   -0.08080  12.000000
     20         ca      1    OHT    C19     20   -0.16050  12.000000
     21         ca      1    OHT    C20     21    0.13280  12.000000
     22         os      1    OHT    O20     22   -0.32490  16.000000
     23         c3      1    OHT    C23     23    0.12760  12.000000
     24         c3      1    OHT    C24     24    0.17240  12.000000
     25         n3      1    OHT    N24     25   -0.74670  14.000000
     26         c3      1    OHT    C25     26    0.16000  12.000000
     27         c3      1    OHT    C26     27    0.16650  12.000000
     28         ca      1    OHT    C21     28   -0.20950  12.000000
     29         ca      1    OHT    C22     29   -0.07840  12.000000
     30         h1      1    OHT   H263     30    0.00150   1.000000
     31         h1      1    OHT   H262     31    0.04950   1.000000
     32         h1      1    OHT   H261     32    0.04480   1.000000
     33         h1      1    OHT   H253     33    0.03530   1.000000
     34         h1      1    OHT   H252     34    0.00500   1.000000
     35         h1      1    OHT   H251     35    0.05060   1.000000
     36         h1      1    OHT   H242     36    0.02390   1.000000
     37         h1      1    OHT   H241     37    0.07020   1.000000
     38         h1      1    OHT   H232     38    0.05310   1.000000
     39         h1      1    OHT   H231     39    0.03440   1.000000
     40         hc      1    OHT   H103     40    0.04260   1.000000
     41         hc      1    OHT   H102     41    0.03010   1.000000
     42         hc      1    OHT   H101     42    0.03390   1.000000
     43         ho      1    OHT    HO4     43    0.41810   1.000000
     44         hc      1    OHT    H92     44    0.04990   1.000000
     45         hc      1    OHT    H91     45    0.05550   1.000000
     46         ha      1    OHT     H6     46    0.13840   1.000000
     47         ha      1    OHT     H5     47    0.13260   1.000000
     48         ha      1    OHT     H3     48    0.15160   1.000000
     49         ha      1    OHT    H22     49    0.13540   1.000000
     50         ha      1    OHT    H21     50    0.13480   1.000000
     51         ha      1    OHT     H2     51    0.14400   1.000000
     52         ha      1    OHT    H19     52    0.14860   1.000000
     53         ha      1    OHT    H18     53    0.13890   1.000000
     54         ha      1    OHT    H16     54    0.13590   1.000000
     55         ha      1    OHT    H15     55    0.13110   1.000000
     56         ha      1    OHT    H14     56    0.12990   1.000000
     57         ha      1    OHT    H13     57    0.13140   1.000000
     58         ha      1    OHT    H12     58    0.13240   1.000000

[ bonds ]
;  ai    aj funct  r  k
     1    40     1  1.0920e-01  2.8225e+05
     1    41     1  1.0920e-01  2.8225e+05
     1    42     1  1.0920e-01  2.8225e+05
     2    44     1  1.0920e-01  2.8225e+05
     2    45     1  1.0920e-01  2.8225e+05
     5    54     1  1.0870e-01  2.8811e+05
     6    55     1  1.0870e-01  2.8811e+05
     7    56     1  1.0870e-01  2.8811e+05
     8    57     1  1.0870e-01  2.8811e+05
     9    58     1  1.0870e-01  2.8811e+05
    12    51     1  1.0870e-01  2.8811e+05
    13    48     1  1.0870e-01  2.8811e+05
    15    43     1  9.7400e-02  3.0928e+05
    16    47     1  1.0870e-01  2.8811e+05
    17    46     1  1.0870e-01  2.8811e+05
    19    53     1  1.0870e-01  2.8811e+05
    20    52     1  1.0870e-01  2.8811e+05
    23    38     1  1.0930e-01  2.8108e+05
    23    39     1  1.0930e-01  2.8108e+05
    24    36     1  1.0930e-01  2.8108e+05
    24    37     1  1.0930e-01  2.8108e+05
    26    33     1  1.0930e-01  2.8108e+05
    26    34     1  1.0930e-01  2.8108e+05
    26    35     1  1.0930e-01  2.8108e+05
    27    30     1  1.0930e-01  2.8108e+05
    27    31     1  1.0930e-01  2.8108e+05
    27    32     1  1.0930e-01  2.8108e+05
    28    50     1  1.0870e-01  2.8811e+05
    29    49     1  1.0870e-01  2.8811e+05
     1     2     1  1.5350e-01  2.5363e+05
     2     3     1  1.5050e-01  2.7723e+05
     3     4     1  1.4720e-01  3.0627e+05
     3    10     1  1.3380e-01  4.7062e+05
     4     5     1  1.3870e-01  4.0033e+05
     4     9     1  1.3870e-01  4.0033e+05
     5     6     1  1.3870e-01  4.0033e+05
     6     7     1  1.3870e-01  4.0033e+05
     7     8     1  1.3870e-01  4.0033e+05
     8     9     1  1.3870e-01  4.0033e+05
    10    11     1  1.4720e-01  3.0627e+05
    10    18     1  1.4720e-01  3.0627e+05
    11    12     1  1.3870e-01  4.0033e+05
    11    17     1  1.3870e-01  4.0033e+05
    12    13     1  1.3870e-01  4.0033e+05
    13    14     1  1.3870e-01  4.0033e+05
    14    15     1  1.3620e-01  3.2309e+05
    14    16     1  1.3870e-01  4.0033e+05
    16    17     1  1.3870e-01  4.0033e+05
    18    19     1  1.3870e-01  4.0033e+05
    18    29     1  1.3870e-01  4.0033e+05
    19    20     1  1.3870e-01  4.0033e+05
    20    21     1  1.3870e-01  4.0033e+05
    21    22     1  1.3730e-01  3.1162e+05
    21    28     1  1.3870e-01  4.0033e+05
    22    23     1  1.4390e-01  2.5230e+05
    23    24     1  1.5350e-01  2.5363e+05
    24    25     1  1.4700e-01  2.6828e+05
    25    26     1  1.4700e-01  2.6828e+05
    25    27     1  1.4700e-01  2.6828e+05
    28    29     1  1.3870e-01  4.0033e+05

[ pairs ]
;  ai    aj funct
     40      3      1
     41      3      1
     42      3      1
      3     54      1
      3     58      1
      4     44      1
      4     45      1
      4     55      1
      4     57      1
      5     58      1
      5     56      1
      6     57      1
      7     54      1
      7     58      1
      8     55      1
      9     54      1
      9     56      1
     10     44      1
     10     45      1
     10     51      1
     10     46      1
     10     53      1
     10     49      1
     11     48      1
     11     47      1
     12     46      1
     13     43      1
     13     47      1
     14     51      1
     14     46      1
     15     48      1
     15     47      1
     16     48      1
     16     43      1
     17     51      1
     18     52      1
     18     50      1
     19     49      1
     20     50      1
     21     53      1
     21     38      1
     21     39      1
     21     49      1
     22     52      1
     22     50      1
     22     36      1
     22     37      1
     24     33      1
     24     34      1
     24     35      1
     24     30      1
     24     31      1
     24     32      1
     25     38      1
     25     39      1
     26     36      1
     26     37      1
     26     30      1
     26     31      1
     26     32      1
     27     36      1
     27     37      1
     27     33      1
     27     34      1
     27     35      1
     28     52      1
     29     53      1
     36     38      1
     36     39      1
     37     38      1
     37     39      1
     40     44      1
     40     45      1
     41     44      1
     41     45      1
     42     44      1
     42     45      1
     46     47      1
     48     51      1
     49     50      1
     52     53      1
     54     55      1
     55     56      1
     56     57      1
     57     58      1
      1      4      1
      1     10      1
      2      5      1
      2      9      1
      2     11      1
      2     18      1
      3      6      1
      3      8      1
      3     12      1
      3     17      1
      3     19      1
      3     29      1
      4     11      1
      4     18      1
      4      7      1
      5     10      1
      5      8      1
      6      9      1
      9     10      1
     10     13      1
     10     16      1
     10     20      1
     10     28      1
     11     19      1
     11     29      1
     11     14      1
     12     18      1
     12     16      1
     12     15      1
     13     17      1
     15     17      1
     17     18      1
     18     21      1
     19     28      1
     19     22      1
     20     29      1
     20     23      1
     21     24      1
     22     29      1
     22     25      1
     23     28      1
     23     26      1
     23     27      1

[ angles ]
;  ai    aj    ak funct  theta   cth
     1     2    44     1  1.1005e+02  3.8802e+02
     1     2    45     1  1.1005e+02  3.8802e+02
     2     1    40     1  1.1005e+02  3.8802e+02
     2     1    41     1  1.1005e+02  3.8802e+02
     2     1    42     1  1.1005e+02  3.8802e+02
     3     2    44     1  1.1098e+02  3.9330e+02
     3     2    45     1  1.1098e+02  3.9330e+02
     4     5    54     1  1.2001e+02  4.0551e+02
     4     9    58     1  1.2001e+02  4.0551e+02
     5     6    55     1  1.2001e+02  4.0551e+02
     6     5    54     1  1.2001e+02  4.0551e+02
     6     7    56     1  1.2001e+02  4.0551e+02
     7     6    55     1  1.2001e+02  4.0551e+02
     7     8    57     1  1.2001e+02  4.0551e+02
     8     7    56     1  1.2001e+02  4.0551e+02
     8     9    58     1  1.2001e+02  4.0551e+02
     9     8    57     1  1.2001e+02  4.0551e+02
    11    12    51     1  1.2001e+02  4.0551e+02
    11    17    46     1  1.2001e+02  4.0551e+02
    12    13    48     1  1.2001e+02  4.0551e+02
    13    12    51     1  1.2001e+02  4.0551e+02
    14    13    48     1  1.2001e+02  4.0551e+02
    14    15    43     1  1.0947e+02  4.0878e+02
    14    16    47     1  1.2001e+02  4.0551e+02
    16    17    46     1  1.2001e+02  4.0551e+02
    17    16    47     1  1.2001e+02  4.0551e+02
    18    19    53     1  1.2001e+02  4.0551e+02
    18    29    49     1  1.2001e+02  4.0551e+02
    19    20    52     1  1.2001e+02  4.0551e+02
    20    19    53     1  1.2001e+02  4.0551e+02
    21    20    52     1  1.2001e+02  4.0551e+02
    21    28    50     1  1.2001e+02  4.0551e+02
    22    23    38     1  1.0882e+02  4.2543e+02
    22    23    39     1  1.0882e+02  4.2543e+02
    23    24    36     1  1.1007e+02  3.8794e+02
    23    24    37     1  1.1007e+02  3.8794e+02
    24    23    38     1  1.1007e+02  3.8794e+02
    24    23    39     1  1.1007e+02  3.8794e+02
    25    24    36     1  1.0992e+02  4.1330e+02
    25    24    37     1  1.0992e+02  4.1330e+02
    25    26    33     1  1.0992e+02  4.1330e+02
    25    26    34     1  1.0992e+02  4.1330e+02
    25    26    35     1  1.0992e+02  4.1330e+02
    25    27    30     1  1.0992e+02  4.1330e+02
    25    27    31     1  1.0992e+02  4.1330e+02
    25    27    32     1  1.0992e+02  4.1330e+02
    28    29    49     1  1.2001e+02  4.0551e+02
    29    28    50     1  1.2001e+02  4.0551e+02
    30    27    31     1  1.0955e+02  3.2786e+02
    30    27    32     1  1.0955e+02  3.2786e+02
    31    27    32     1  1.0955e+02  3.2786e+02
    33    26    34     1  1.0955e+02  3.2786e+02
    33    26    35     1  1.0955e+02  3.2786e+02
    34    26    35     1  1.0955e+02  3.2786e+02
    36    24    37     1  1.0955e+02  3.2786e+02
    38    23    39     1  1.0955e+02  3.2786e+02
    40     1    41     1  1.0835e+02  3.2995e+02
    40     1    42     1  1.0835e+02  3.2995e+02
    41     1    42     1  1.0835e+02  3.2995e+02
    44     2    45     1  1.0835e+02  3.2995e+02
     1     2     3     1  1.1096e+02  5.3304e+02
     2     3     4     1  1.1911e+02  5.2559e+02
     2     3    10     1  1.1740e+02  5.4978e+02
     3     4     5     1  1.2066e+02  5.4292e+02
     3     4     9     1  1.2066e+02  5.4292e+02
     3    10    11     1  1.2308e+02  5.4559e+02
     3    10    18     1  1.2308e+02  5.4559e+02
     4     3    10     1  1.2308e+02  5.4559e+02
     4     5     6     1  1.1997e+02  5.6216e+02
     4     9     8     1  1.1997e+02  5.6216e+02
     5     4     9     1  1.1997e+02  5.6216e+02
     5     6     7     1  1.1997e+02  5.6216e+02
     6     7     8     1  1.1997e+02  5.6216e+02
     7     8     9     1  1.1997e+02  5.6216e+02
    10    11    12     1  1.2066e+02  5.4292e+02
    10    11    17     1  1.2066e+02  5.4292e+02
    10    18    19     1  1.2066e+02  5.4292e+02
    10    18    29     1  1.2066e+02  5.4292e+02
    11    10    18     1  1.1553e+02  5.3974e+02
    11    12    13     1  1.1997e+02  5.6216e+02
    11    17    16     1  1.1997e+02  5.6216e+02
    12    11    17     1  1.1997e+02  5.6216e+02
    12    13    14     1  1.1997e+02  5.6216e+02
    13    14    15     1  1.1994e+02  5.8450e+02
    13    14    16     1  1.1997e+02  5.6216e+02
    14    16    17     1  1.1997e+02  5.6216e+02
    15    14    16     1  1.1994e+02  5.8450e+02
    18    19    20     1  1.1997e+02  5.6216e+02
    18    29    28     1  1.1997e+02  5.6216e+02
    19    18    29     1  1.1997e+02  5.6216e+02
    19    20    21     1  1.1997e+02  5.6216e+02
    20    21    22     1  1.1920e+02  5.8400e+02
    20    21    28     1  1.1997e+02  5.6216e+02
    21    22    23     1  1.1797e+02  5.2108e+02
    21    28    29     1  1.1997e+02  5.6216e+02
    22    21    28     1  1.1920e+02  5.8400e+02
    22    23    24     1  1.0842e+02  5.6718e+02
    23    24    25     1  1.1038e+02  5.5379e+02
    24    25    26     1  1.1090e+02  5.3564e+02
    24    25    27     1  1.1090e+02  5.3564e+02
    26    25    27     1  1.1090e+02  5.3564e+02

[ dihedrals ]
;i  j   k  l     func   C0  ...  C5
     40   1    2    3      3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     41   1    2    3      3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     42   1    2    3      3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     3    4    5    54     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     3    4    9    58     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     4    3    2    44     3     0.00000     0.00000     0.00000     0.00000    
 0.00000     0.00000     ;
     4    3    2    45     3     0.00000     0.00000     0.00000     0.00000    
 0.00000     0.00000     ;
     4    5    6    55     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     4    9    8    57     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     5    4    9    58     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     5    6    7    56     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     6    7    8    57     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     7    6    5    54     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     7    8    9    58     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     8    7    6    55     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     9    4    5    54     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     9    8    7    56     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     10   3    2    44     3     0.00000     0.00000     0.00000     0.00000    
 0.00000     0.00000     ;
     10   3    2    45     3     0.00000     0.00000     0.00000     0.00000    
 0.00000     0.00000     ;
     10   11   12   51     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     10   11   17   46     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     10   18   19   53     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     10   18   29   49     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     11   12   13   48     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     11   17   16   47     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     12   11   17   46     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     13   14   15   43     3     7.53120     0.00000    -7.53120     0.00000    
 0.00000     0.00000     ;
     13   14   16   47     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     14   13   12   51     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     14   16   17   46     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     15   14   13   48     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     15   14   16   47     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     16   14   13   48     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     16   14   15   43     3     7.53120     0.00000    -7.53120     0.00000    
 0.00000     0.00000     ;
     17   11   12   51     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     18   19   20   52     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     18   29   28   50     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     19   18   29   49     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     20   21   28   50     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     21   20   19   53     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     21   22   23   38     3     1.60247     4.80742     0.00000    -6.40989    
 0.00000     0.00000     ;
     21   22   23   39     3     1.60247     4.80742     0.00000    -6.40989    
 0.00000     0.00000     ;
     21   28   29   49     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     22   21   20   52     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     22   21   28   50     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     22   23   24   36     3     1.04600    -1.04600     0.00000     0.00000    
 0.00000     0.00000     ;
     22   23   24   37     3     1.04600    -1.04600     0.00000     0.00000    
 0.00000     0.00000     ;
     24   25   26   33     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     24   25   26   34     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     24   25   26   35     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     24   25   27   30     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     24   25   27   31     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     24   25   27   32     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     25   24   23   38     3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     25   24   23   39     3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     26   25   24   36     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     26   25   24   37     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     26   25   27   30     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     26   25   27   31     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     26   25   27   32     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     27   25   24   36     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     27   25   24   37     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     27   25   26   33     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     27   25   26   34     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     27   25   26   35     3     1.25520     3.76560     0.00000    -5.02080    
 0.00000     0.00000     ;
     28   21   20   52     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     29   18   19   53     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     36   24   23   38     3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     36   24   23   39     3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     37   24   23   38     3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     37   24   23   39     3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     40   1    2    44     3     0.62760     1.88280     0.00000    -2.51040    
 0.00000     0.00000     ;
     40   1    2    45     3     0.62760     1.88280     0.00000    -2.51040    
 0.00000     0.00000     ;
     41   1    2    44     3     0.62760     1.88280     0.00000    -2.51040    
 0.00000     0.00000     ;
     41   1    2    45     3     0.62760     1.88280     0.00000    -2.51040    
 0.00000     0.00000     ;
     42   1    2    44     3     0.62760     1.88280     0.00000    -2.51040    
 0.00000     0.00000     ;
     42   1    2    45     3     0.62760     1.88280     0.00000    -2.51040    
 0.00000     0.00000     ;
     46   17   16   47     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     48   13   12   51     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     49   29   28   50     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     52   20   19   53     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     54   5    6    55     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     55   6    7    56     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     56   7    8    57     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     57   8    9    58     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     4    6    5    54     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     5    7    6    55     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     6    8    7    56     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     7    9    8    57     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     4    8    9    58     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     11   13   12   51     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     12   14   13   48     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     14   17   16   47     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     11   16   17   46     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     18   20   19   53     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     19   21   20   52     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     21   29   28   50     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     18   28   29   49     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     1    2    3    4      3     0.00000     0.00000     0.00000     0.00000    
 0.00000     0.00000     ;
     1    2    3    10     3     0.00000     0.00000     0.00000     0.00000    
 0.00000     0.00000     ;
     2    3    4    5      3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     2    3    4    9      3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     2    3    10   11     3    55.64720     0.00000   -55.64720     0.00000    
 0.00000     0.00000     ;
     2    3    10   18     3    55.64720     0.00000   -55.64720     0.00000    
 0.00000     0.00000     ;
     3    4    5    6      3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     3    4    9    8      3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     3    10   11   12     3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     3    10   11   17     3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     3    10   18   19     3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     3    10   18   29     3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     4    3    10   11     3    55.64720     0.00000   -55.64720     0.00000    
 0.00000     0.00000     ;
     4    3    10   18     3    55.64720     0.00000   -55.64720     0.00000    
 0.00000     0.00000     ;
     4    5    6    7      3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     4    9    8    7      3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     5    4    3    10     3    55.64720     0.00000   -55.64720     0.00000    
 0.00000     0.00000     ;
     5    4    9    8      3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     5    6    7    8      3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     6    5    4    9      3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     6    7    8    9      3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     9    4    3    10     3    55.64720     0.00000   -55.64720     0.00000    
 0.00000     0.00000     ;
     10   11   12   13     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     10   11   17   16     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     10   18   19   20     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     10   18   29   28     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     11   10   18   19     3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     11   10   18   29     3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     11   12   13   14     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     11   17   16   14     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     12   11   10   18     3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     12   11   17   16     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     12   13   14   15     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     12   13   14   16     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     13   12   11   17     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     13   14   16   17     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     15   14   16   17     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     17   11   10   18     3    21.33840     0.00000   -21.33840     0.00000    
 0.00000     0.00000     ;
     18   19   20   21     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     18   29   28   21     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     19   18   29   28     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     19   20   21   22     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     19   20   21   28     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     20   19   18   29     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     20   21   22   23     3     7.53120     0.00000    -7.53120     0.00000    
 0.00000     0.00000     ;
     20   21   28   29     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     21   22   23   24     3     1.60247     4.80742     0.00000    -6.40989    
 0.00000     0.00000     ;
     22   21   28   29     3    30.33400     0.00000   -30.33400     0.00000    
 0.00000     0.00000     ;
     22   23   24   25     3     0.65270     1.95811     0.00000    -2.61082    
 0.00000     0.00000     ;
     23   22   21   28     3     7.53120     0.00000    -7.53120     0.00000    
 0.00000     0.00000     ;
     23   24   25   26     3     5.27184     3.76560    -4.01664    -5.02080    
 0.00000     0.00000     ;
     23   24   25   27     3     5.27184     3.76560    -4.01664    -5.02080    
 0.00000     0.00000     ;
     2    4    3    10     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     5    9    4    3      3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     11   18   10   3      3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     12   17   11   10     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     13   16   14   15     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     19   29   18   10     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;
     20   28   21   22     3     9.20480     0.00000    -9.20480     0.00000    
 0.00000     0.00000     ;


; water topology
#include "tip3p.itp"

grompp is not detecting the change of [moleculetype], so you will have to look at the contents of that tip3p.itp and see why. I think you will need to #include some standard force field to get the water parameters. Put the #include for tip3p.itp above your [moleculetype] to get some different diagnostics that may be more helpful.

Mark


[ system ]
58 system in water

[ molecules ]
; Compound        nmols
solute            1
SOL              1339


  and this time it gave me another wrong message:  [ file tip3p.itp, line 52 ]:
Atom index (1) in settles out of bounds (1-0).
This probably means that you have inserted topology section "settles"
in a part belonging to a different molecule than you intended to.
In that case move the "settles" section to the right molecule.

I cannot figure out why, does anyone have any idea about this?

Regards
Chunxia


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