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I was trying to simulate carbon nanotube using the tutorial Carbon Nanotube - Gromacs
However, when I tried running the command
gmx x2top -f cnt.gro -o cnt.top -ff cnt_oplsaa -name CNT -noparam
It showed me this error-
Could not find force field ‘cnt_oplsaa’ in current directory, install tree or
GMXLIB path.
I did check again and I do have a directory called cnt_oplsaa.ff and it has three files cnt.itp, cnt.n2t and cnt.rtp.
I also tried using cnt_oplsaa.ff in the command instead of cnt_oplsaa but I still got the same error. Can someone please assist me with this?
Thank you,
Sparsh