[gmx-users] Magic number error

zazeri zazeri at yahoo.com.br
Sat Jul 14 19:38:16 CEST 2007

My xtc file is smaller than 1 GB.
When I use it as input in programs such as g_order,
g_potential, etc it has been getting the same problem.
The computer that I've been using is a workstation
2 Dual-Core processors.

Cheers, Chris.

--- Chris Neale <chris.neale at utoronto.ca> escreveu:

> >Program trjconv, VERSION 3.3.1
> >Source code file: xtcio.c, line: 83
> >Fatal error:
> >Magic Number Error in XTC file (read 0, should be
> >1995).
> If you are talking about trjconv -e while searching
> more than 2Gb into the file then it is a known issue
> (see bug #126
> and is fixed in CVS but not
> in the standard downloadable versions yet (to
> 3.3.1).
> If you are talking about a different case, please
> send lots more data (but do a search first please).
> I have experienced such problems but that has
> something to do with our cluster and not gromacs. 
> For us, different clusters work fine for gromacs but
> it is only gromacs that has this problem on the
> problematic cluster. 
> Our problem is definately due to an overloaded NFS
> server and we appear to have solved the problem by
> writing 
> to /scratch (local node space) during the run. We
> are still looking into the issue but it may be a
> problem of 
> NFS delay and not NFS corruption and then the
> corruption occurs when we try to trjconv or gmxcheck
> a file 
> that is not yet completely written.
> Chris.
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