He, Yang wrote:
HI Justin,

I just use the mdrun command and then get such error. Before that, I did not 
get other messages just go on well expect when I use the mdrun.

Also, when I did not use the position_restraints , it will run smoothly. As 
long as I add this even though the position_restraints includes only one atom, 
it will show the error.


This is difficult to diagnose exactly. To me, removal of position restraints suggests that you are fixing in place some bad contact that is causing your system to crash. Have a look at the trajectory to see what is going on. Did EM work properly? If you are still having trouble, post a more complete description of your system, relevant .mdp file(s), and anything else necessary to try to get a resolution.

-Justin

Yang
________________________________________
From: [email protected] [[email protected]] On Behalf 
Of Justin A. Lemkul [[email protected]]
Sent: Tuesday, April 14, 2009 3:06 PM
To: Discussion list for GROMACS users
Subject: Re: [gmx-users] the position_restraints

He, Yang wrote:
HI all users,

I want to define the position_restraints in the itp file but when I run it, it 
always show that

Segmentation fault (core dumped)


You'll have to do better than "run it" - what do you mean, grompp? mdrun?

As written, your position restraints look OK, so I don't think the problem is
related to that section, necessarily.  How have you deduced that this is where
the problem lies?

Are you getting any other messages from (grompp? mdrun?) before the seg fault?

-Justin

and I will list the part below:

 [position_restraints]
;ai funct fc
  1    1    10000   10000   10000
  2    1    10000   10000   10000
  3    1    10000   10000   10000
  4    1    10000   10000   10000
  5    1    10000   10000   10000
  6    1    10000   10000   10000
  7    1    10000   10000   10000
  8    1    10000   10000   10000
  9    1    10000   10000   10000
 10    1    10000   10000   10000
 11    1    10000   10000   10000
 12    1    10000   10000   10000
 13    1    10000   10000   10000
 14    1    10000   10000   10000
 15    1    10000   10000   10000
 16    1    10000   10000   10000
 17    1    10000   10000   10000
 18    1    10000   10000   10000
 19    1    10000   10000   10000
 20    1    10000   10000   10000
 41    1    10000   10000   10000
 42    1    10000   10000   10000
 43    1    10000   10000   10000
 44    1    10000   10000   10000
 45    1    10000   10000   10000
 46    1    10000   10000   10000
 47    1    10000   10000   10000
 48    1    10000   10000   10000
 49    1    10000   10000   10000
 50    1    10000   10000   10000
 51    1    10000   10000   10000
 52    1    10000   10000   10000
 53    1    10000   10000   10000
 54    1    10000   10000   10000
 55    1    10000   10000   10000
 56    1    10000   10000   10000
 57    1    10000   10000   10000
 58    1    10000   10000   10000
 59    1    10000   10000   10000
 60    1    10000   10000   10000

Can anyone of you tell me what is the problem for that?  Thank you very much in 
advance.

Yang
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--
========================================

Justin A. Lemkul
Graduate Research Assistant
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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--
========================================

Justin A. Lemkul
Graduate Research Assistant
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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