<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Did you try NA or CL.<div>All caps worked for me last time I used this.</div><div>Egy</div><div><br></div><div><br><div><div>On Dec 11, 2011, at 4:17 AM, Setare Jiji wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td valign="top" style="font: inherit;"><div id="yiv132136674"><table id="yiv132136674bodyDrftID" class="yiv132136674" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td id="yiv132136674drftMsgContent" style="font:inherit;font-family:arial;font-size:10pt;">Hi,<br>Thanks for your responding.<br><br>I checked my ions.itp file in which file sodium and chlorine ions are as Na and Cl form.<br><br>Thus, I used genion as follows:<br><br>genion -s ions.tpr -o 1AKI_solv_ions.gro -p topol.top -nname Cl -nn 8 -pname Na<br><br>Unfortunately, I encountered same fatal error.<br><br>any help will highly appreciated.<br><br></td></tr></tbody></table></div></td></tr></tbody></table>-- <br>gmx-users mailing list <a href="mailto:gmx-users@gromacs.org">gmx-users@gromacs.org</a><br><a href="http://lists.gromacs.org/mailman/listinfo/gmx-users">http://lists.gromacs.org/mailman/listinfo/gmx-users</a><br>Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting!<br>Please don't post (un)subscribe requests to the list. Use the <br>www interface or send it to gmx-users-request@gromacs.org.<br>Can't post? Read http://www.gromacs.org/Support/Mailing_Lists</blockquote></div><br></div></body></html>