<DIV> Hi all!<BR> I have a protein-protein complex in my simulation so I used the pdb2gmx command <BR>for getting the .itp file. Then i added the corresponding .itp file in the top file .<BR></DIV> <DIV>While running the grompp i am getting the following error:</DIV> <DIV> </DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT face="Times New Roman" size=3>ERROR 1 [file "drg.itp", line 7]:</FONT></DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>Incorrect number of atomtypes for dihedral (4 instead of 2 or 4)</FONT></FONT></DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT face="Times New Roman" size=3>ERROR 2 [file "drg.itp", line 8]:</FONT></DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes">
</SPAN>Incorrect number of atomtypes for dihedral (4 instead of 2 or 4)</FONT></FONT></DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT face="Times New Roman" size=3>ERROR 3 [file "drg.itp", line 9]:</FONT></DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>Incorrect number of atomtypes for dihedral (4 instead of 2 or 4)..............</FONT></FONT></DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT face="Times New Roman" size=3></FONT> </DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT face="Times New Roman" size=3>But when I checked the .itp file it is exactly same the .itp file of my successful simulations of the ligand protein.</FONT></DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT size=+0>I would be very grateful<FONT face="Times New
Roman" size=3> to know why I get this type of error and what can I do about this.<SPAN> </SPAN>Thanks very much.</FONT></FONT></DIV> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT size=3><FONT face="Times New Roman">Best Regard<BR> Fulya</DIV> <DIV> </DIV> <DIV>Hacettepe University</DIV> <DIV>Turkey</DIV></FONT></FONT> <DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 6pt"><FONT face="Times New Roman" size=3></FONT> </DIV> <DIV><BR><BR> </DIV><p> 
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