Dear all ,<br> I want to simulate a double walled nano tube in spc water i had made the pdb file now if i use g_x2top for creating the topology file it gives me the following error .<br><br>
Now if i run <b> g_x2top -f out.pdb -o out.top -ff oplsaa</b><br>it gives the following error<br><br><b>Can not find forcefield for atom OW-5432 with 2 bonds<br>Can not find forcefield for atom OW-5435 with 2 bonds<br>Can not find forcefield for atom OW-5438 with 2 bonds <br>
Can not find forcefield for atom OW-5441 with 2 bonds<br>Can not find forcefield for atom OW-5444 with 2 bonds<br>Can not find forcefield for atom OW-5447 with 2 bonds<br>Can not find forcefield for atom OW-5450 with 2 bonds<br>
<br><br>looking forward for your suggestions,<br>Thanks in advance,<br>sree.</b>