Re: AMBER: imin=5 in sander

From: Asim Okur <>
Date: Tue, 07 Dec 2004 15:44:52 -0500


Try to set ntwx=1 in your input file. The default value is 0 and then
the trajectory file is not opened.


Asim Okur
Stony Brook University
Chemisty Department
Stony Brook, NY 11794-3400
631 - 632 1560
>Hi Amber users,
>I am trying to run sunder with imin=5 parameter for trajectory analysis. But
>sander cannot process my trajectory file. Sander reads rst or inpcrd files but
>gives out this message when I try to run with a mdcrd file:
>fmt: read unexpected character
>apparent state: internal I/O
>last format: (i6,e15.7)
>lately reading sequential formatted internal IO
>./min5_EN.q: line 7: 15353 Aborted                 $AMBERHOME/exe/sander -O -i
> -o min5_EN.out -p 3_20.prmtop 
>-c 3_20.mdcrd -r new.rst -ref 3_20.mdcrd
>I realized that there is a number at the beginning of my inpcrd files (something
>like 39150) and that does not exist in a mdcrd file. I suspect that may be a
>Is there an intermediate step before analyzing a trajectory file with imin=5?
>also my sander input file is:
> &cntrl
>  imin   = 5,
>  maxcyc = 1,
>  ntb    = 1,
>  ntr    = 0,
>  cut    = 10
> /
>Thanks in advance...
>Biomolecular Materials Lab,
>Dept. of Engr. Science and Mechanics,
>The Pennsylvania State University,
>University Park, PA 16802
>office: (814) 863 9967
>The AMBER Mail Reflector
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Received on Tue Dec 07 2004 - 20:53:01 PST
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