mohit kumar wrote:
but i dnt find any 'type' column in my topology file..the grompp programm with this top file works gud in 3.3 version..im having 4.0.5 version..is that can be issue?? shud i try in 3.3 version


This may be some new error-checking mechanism introduced in version 4.0. In your topology, a function type for pairs should be defined, according to the header of this section (from pdb2gmx):

[ pairs ]
;  ai    aj funct            c0            c1            c2            c3

If your "funct" column is blank or says "0" then that could be giving the error.

-Justin

On Thu, Aug 6, 2009 at 2:48 PM, Justin A. Lemkul <jalem...@vt.edu <mailto:jalem...@vt.edu>> wrote:



    mohit kumar wrote:

        im running energy minimization for POPC bilayer but its showing
        error which i cant figure out

        -- -------------------------------------------------------
        Program grompp, VERSION 4.0.5
        Source code file: topdirs.c, line: 99

        Fatal error:
        Invalid pairs type 0

        what does this pair type mean and how can i solve it?? plz help me


    The error message is pretty clear.  Somewhere within the topology,
    you have a "0" in the "type" column, which doesn't correspond to any
    known pair type.

    -Justin



        MOHIT KUMAR
        Molecular Biochemistry & Biophysics
        Graduate Student
        Illinois Institute of Technology
        Chicago,IL, USA


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-- ========================================

    Justin A. Lemkul
    Ph.D. Candidate
    ICTAS Doctoral Scholar
    Department of Biochemistry
    Virginia Tech
    Blacksburg, VA
    jalemkul[at]vt.edu <http://vt.edu> | (540) 231-9080
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--
MOHIT KUMAR
Molecular Biochemistry & Biophysics
Graduate Student
Illinois Institute of Technology
Chicago,IL, USA


--
========================================

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

========================================
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