Thanks Francesca. There is no bond between them. I merged topologies and the grompp error comes from the gmx bug posted by Mark. <a href="http://redmine.gromacs.org/issues/885">http://redmine.gromacs.org/issues/885</a><br>
Thanks for this link Justin!<br><br>Steven<br><br><div class="gmail_quote">On Fri, May 25, 2012 at 5:47 PM, Francesca <span dir="ltr"><<a href="mailto:francesca.stanzione@unina.it" target="_blank">francesca.stanzione@unina.it</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">if you create a bond you need to have angle, tortion etc...<br>
Maybe when you processed pb2gmx it create a bond between the 799 and 801.<br>
Francesca<br>
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