Re: AMBER: Problem with ptraj

From: Thomas Cheatham <tec3.utah.edu>
Date: Tue, 12 Sep 2006 20:47:46 -0600 (Mountain Daylight Time)

> I am trying to use ptraj to analyse hydrogen bonds. but

To provide more input about your atom selections, set

  prnlev 3

> acceptor T N3 H3

...before the donor/acceptor commands...

> PTRAJ:
> {\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fswiss{\*\generator
> Msftedit 5.41.15.1507;}\viewkind4\uc1\pard\f0WARNING in ptraj(): No input
> trajectories specified (trajin), aborting...

I do not understand all that extra font information (probably from your
e-mail program), but basically ptraj cannot find the trajectories in your
current directory.

> I have checked that the input file DNA_melt.mdcrd is in the $AMBERHOME
> directory.

The file should be in your current directory, not in $AMBERHOME, unless of
course you are running ptraj from $AMBERHOME.

Good luck,

tec3.utah.edu

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Received on Wed Sep 13 2006 - 06:07:20 PDT
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