You have trailing characters in your simulated annealing section:

What shows up for me is:

;simulated annealing
annealing = single^M
annealing_npoints = 5 ^M
annealing_time = 2 500 1000 1500 2000^M
annealing_temp = 300 350 400 450 450^M

Are you transferring between Windows and Linux/Mac/etc. systems? If so, you will need to process your .mdp file with dos2unix.

Unsolicited advice on T-coupling:

tc-grps             =  Protein  SOL  HEM  NA+

It's a bad idea to couple solvent, ions, and small molecules all in different tc-grps. Reference here for information regarding thermostats:

http://wiki.gromacs.org/index.php/thermostats

-Justin

ravi sharma wrote:
Hello guys,
i am doing a simulation with simulated annealing of a protein which contains heme inside, the normal without simulated annealing its running fine but while m writing simulated annealing in my md.mdp its showing error

//Fatal error:
Not enough annealing values: 1 (for 4 groups)


 <http://www.gromacs.org/mailman/listinfo/gmx-users>//

I am attaching my md.mdp file here




md.mdp



Thanks


Ravi Datta Sharma
Lecturer,
Bioinformatics,
Department of Microbiology,
CCS Unversity,
Meerut

--- On *Sun, 7/9/08, Florian Dommert /<[EMAIL PROTECTED]>/* wrote:

    From: Florian Dommert <[EMAIL PROTECTED]>
    Subject: Re: [gmx-users] trr file format
    To: "Discussion list for GROMACS users" <gmx-users@gromacs.org>
    Date: Sunday, 7 September, 2008, 4:54 PM

    On 06.09.2008, at 22:28, Vitaly Chaban wrote:

    > Hello,
    >
    > Where can I read about the exact format of the TRR and XTC files. I
    > mean the width and type of every field in the binary trajectory file.
    >
    > I see read_'next_frame(status,&fr)' function in
    'template.c'. But
    > where is this fuction defined?
    > Sorry, I'm not an expert in C. :(
    >

    Hello,

if you have problems, finding appropiate header files for the functions of gmx, you can perhaps use a development environment like Eclipse, Source-Navigator, KDevelop, Anjuta depending on your flavour and operating system. This programs index all the functions in a specified project and you can look up their definitions by request without searching the files of the complete src-code. It is hard to rank the different programs due to their various capabilities and your
     requirements.
Eclipse Ganymed is a special C/C++ Development environment and accesible for every OS. Furthermore it is modular and you can also advance it to a MATLAB-like enviroment including the PyDev module and using python modules like numpy and scipy. It is also capable of accesing CVS trees directly. In my opinion this program package is flexible and helpful. Once everything is installed and configured it can be handled very easily. The other mentioned packages are Red-Hat, KDE, and GNOME development environments. However as I mentioned at the end it is a question of flavor.

    Best Regards,

    Flo


    > Thanks.
    >
> -- > Vitaly V. Chaban
    > School of Chemistry
    > National University of Kharkiv
    > Svoboda sq.,4, Kharkiv 61077, Ukraine
    > email: [EMAIL PROTECTED]
    > skype: vvchaban
    >
    >
     _______________________________________________
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    --
    Florian Dommert
    Dipl.-Phys.

    Computational and Theoretical Softmatter & Biophysics group

    Frankfurt Institute for Advanced Studies
    Johann-Wolfgang-Goethe University

    Ruth-Moufang-Str. 1
    60438 Frankfurt am Main

    Phone: +49(0)69 / 798 - 47522
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     http://fias.uni-frankfurt.de/~simbio/Florian_Dommert

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

Justin A. Lemkul
Graduate Research Assistant
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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