[gmx-users] add NaCl

[mohammad r]

Hi;
I've already converted topology and coordinate files which were generated with amber tools to .gro format. But now, when I want to add 100Mm NaCl to the system I get this error:
Fatal error:
No line with moleculetype 'SOL' found the [ molecules ] section of file 'c6m1_GMX.top'
For more information and tips for troubleshooting, please check the GROMACS
website at http://www.gromacs.org/Documentation/Errors

I think that it cannot recognize the solvent. How can I fix it?
Thank you, Mohammad