[gmx-users] Error:Cannot determine precision of trn file

Justin A. Lemkul jalemkul at vt.edu
Tue Jul 8 02:49:00 CEST 2008

What does gmxcheck tell you about these .trr files?

Also, it is better to give exact command lines with copy-pasted screen 
output, instead of leaving us to guess at what you're trying.


plmallip at mail.uh.edu wrote:
> Dear colleagues,
>                   I successfully finished a 3 ns gromacs run using 40 
> nodes.  When, I tried to convert .trr file to .xtc using trjconv, the 
> run stops at 560 frame giving error "cannot determimine precision of 
> trn file". I tried various options like -skip, -b and -e, -dt option 
> as well as -ndx option . But, each time, the run stops at 560. 
>                 The second run I gave for 6 ns and this time, the 
> trjconv stops at 1180 frame. I have observed the .trr files occupying 
> huge memory space - 18 G for 3ns and 34 G for 6 ns runs respectively. 
> Memory is not a problem, as I have lot of disk space available.
>       My system is a pentamer with 1052 residues and 47201 water 
> molecules.The simulation ran for 5 days.
> I would be extremely thankful for any kind of suggestions in this regard.
> Prema,
> Graduate student,
> University of Houston.
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Justin A. Lemkul
Graduate Research Assistant
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080


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