<P>
&nbsp; hi,<BR>
&nbsp; &nbsp;  I am trying to run gromacs using charmm but I am facing the following error while <BR>
running the &quot;grompp&quot; command<BR>
<BR>
 checking input for internal consistency...<BR>
calling /usr/local/bin/cpp...<BR>
topol.top:11:24: /usr/local/gromacs/share/gromacs/top/ffcharmm.itp: Permission denied<BR>
topol.top:696:28: /usr/local/gromacs/share/gromacs/top/tip3p-charmm.itp: Permission <BR>
denied<BR>
<BR>
<BR>
Fatal error:<BR>
Invalid order for directive moleculetype, file &quot;&quot;topol.top&quot;&quot;, line 13<BR>
 <BR>
I need help to fix this problem.<BR>
any suggestion is welcome.<BR>
<BR>
Thanks in advance.<BR>

</P>
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<Table border=0 Width=644 Height=57 cellspacing=0 cellpadding=0 style='font-family:Verdana;font-size:11px;line-height:15px;'><TR><td><a href='http://adworks.rediff.com/cgi-bin/AdWorks/click.cgi/www.rediff.com/signature-home.htm/1050715198@Middle5/2031830_2024620/2031710/1?PARTNER=3&OAS_QUERY=null' target=new ><img src ='http://imadworks.rediff.com/cgi-bin/AdWorks/adimage.cgi/2031830_2024620/creative_2031710.gif'  alt='Jeevan Sathi'  border=0></a></td></TR></Table>