Dear Justin
My cnt is infinite.
I obtained cnt.top by g_x2top and then modified cnt.top to cnt.itp.
For obtaining cnt.top, I used following files:
-----------------------------------------------------------
ffcnt.atp:
CA 12.01100 ; aromatic C
-----------------------------------------------------------
ffcnt.n2t:
C CA 0.00 12.011 3 C 0.141 C 0.141 C 0.141
C CA 0.00 12.011 2 C 0.141 C 0.141
-----------------------------------------------------------
ffcntbon.itp:
[ bondtypes ]
; i j func b0 kb
CA CA 3 0.1418 47890.0 21.867
[ angletypes ]
; i j k func th0 cth ub0 cub
CA CA CA 2 120.00 562.20
[ dihedraltypes ]
; i j k l func phi0 cp mult
CA CA CA CA 5 0.00 25.12 0.00 0.00
-----------------------------------------------------------
ffcntnonbon.itp:
[ atomtypes ]
;name at.num mass charge ptype sigma epsi
CA 6 12.01100 0.00 A 0.385 0.4396
-----------------------------------------------------------
In cnt.itp file, angle section of file is as follows:
[ angles ]
; ai aj ak funct c0 c1 c2 c3
2 1 8 1
2 1 287 1
8 1 287 1
1 2 3 1
1 2 10 1
3 2 10 1
2 3 289 1
2 3 406 1
289 3 406 1
5 4 17 1
5 4 320 1
17 4 320 1
4 5 6 1
.
.
.
.
.
.
I saw system.gro file by VMD, there are all angles defined above in
[angle] directive.
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