[gmx-users] Carbon Nanotube Simulations

[George Abadir]

Hi,
     I am using Tubegen to generate a PDB file for carbon nanotubes. 
When I use the "x2top" command I get an error :"Library file ffG43a1.n2t 
not found in current dir nor in default directories". The same error is 
repeated with every other force field. Where can I find this file or how 
can I get around this problem? Your help is much appreciated.
     Thank you very much,
Regards