Dear Justin<br><pre style="font-family: arial,helvetica,sans-serif;">I enclosed the group name  Protein-H and DNA-H in quotes &#39; &#39; and &quot; &quot;.<br></pre>waterO = group SOL and name OW;<br>heavy1 = group &#39;Protein-H&#39;;<br>
heavy2 = group &#39;DNA-H&#39;;<br>inter = waterO and within 0.3 of heavy1 and within 0.3 of heavy2;<br>inter;<br><br>waterO = group SOL and name OW;<br>heavy1 = group &quot;Protein-H&quot;;<br>heavy2 = group &quot;DNA-H&quot;;<br>
inter = waterO and within 0.3 of heavy1 and within 0.3 of heavy2;<br>inter;<br><br><pre style="font-family: arial,helvetica,sans-serif;">but in both of states again:<br><br>selection parser: syntax error<br> heavy1 = group &#39;Protein-H&#39;&#39;lection &#39;<br>
<br>-------------------------------------------------------<br>Program g_select, VERSION 4.5.1<br>Source code file: trajana.c, line: 1310<br><br>Input error or input inconsistency:<br>selection(s) could not be parsed<br>For more information and tips for troubleshooting, please check the GROMACS<br>
website at <a href="http://www.gromacs.org/Documentation/Errors">http://www.gromacs.org/Documentation/Errors</a><br><br></pre>
<br clear="all"><br>-- <br><pre style="font-family: arial,helvetica,sans-serif;">Leila Karami<br>Ph.D. student of Physical Chemistry<br>K.N. Toosi University of Technology<br>Theoretical Physical Chemistry Group</pre><br>