This issue is well-documented in the list archives. You need to create an index group that specifies *only* the groups of interest in the index file, i.e. C16, C17...
There is a post (I believe from Dallas Warren) that even gives examples of make_ndx commands to create such groups, if you need that kind of help. -Justin Quoting pragya chohan <[EMAIL PROTECTED]>: > > hi > I am trying to do the bilayer analysis and want to calculate order parameters > using g_order. I made the index using make_ndx command and selected the > carbons sai 1-16 of my first chain and 17-33 of the other in same index file > as two separate group. When I am giving this index file to g_order I get the > error: > > Using following groups: > Groupname: System First atomname: C1 First atomnr 0 > Groupname: POPC First atomname: C1 First atomnr 0 > Groupname: SOL First atomname: OW First atomnr 6656 > Groupname: oleoyl First atomname: C1 First atomnr 1820 > Groupname: palmitoyl First atomname: C1 First atomnr 832 > > Reading frame 0 time 0.000 Number of elements in first group: > 14036 > ------------------------------------------------------- > Program g_order, VERSION 3.3 > Source code file: gmx_order.c, line: 160 > > Fatal error: > grp 1 does not have same number of elements as grp 1 > > Please help. > > _________________________________________________________________ > Tried the new MSN Messenger? ItÂ’s cool! Download now. > http://messenger.msn.com/Download/Default.aspx?mkt=en-in_______________________________________________ > gmx-users mailing list gmx-users@gromacs.org > http://www.gromacs.org/mailman/listinfo/gmx-users > Please search the archive at http://www.gromacs.org/search before posting! > Please don't post (un)subscribe requests to the list. Use the > www interface or send it to [EMAIL PROTECTED] > Can't post? Read http://www.gromacs.org/mailing_lists/users.php > ======================================== Justin A. Lemkul Graduate Research Assistant Department of Biochemistry Virginia Tech Blacksburg, VA [EMAIL PROTECTED] | (540) 231-9080 http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin/ ======================================== _______________________________________________ gmx-users mailing list gmx-users@gromacs.org http://www.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/search before posting! Please don't post (un)subscribe requests to the list. Use the www interface or send it to [EMAIL PROTECTED] Can't post? Read http://www.gromacs.org/mailing_lists/users.php
