[gmx-users] Magic Number Error

alessandro casoni alessandro.casoni at unimi.it
Mon Jan 28 12:26:17 CET 2008

well, I generated xtc file on a different system..but other files
generate in the same way appear to be ok..

The size is correct..
Il giorno lun, 28/01/2008 alle 21.51 +1100, Mark Abraham ha scritto:
> alessandro casoni wrote:
> > Dear GMX-USERS,
> > I have a little problem...when I use g_covar I get this message:
> > 
> > Program g_covar, VERSION 3.3.2
> > Source code file: xtcio.c, line: 83
> > 
> > Fatal error:
> > Magic Number Error in XTC file (read 0, should be 1995)
> > 
> > 
> > ..could you help me?
> Use ls -l to check that your .xtc file has non-zero size. Otherwise, 
> you've somehow managed to mangle the file so that the "magic" numbers at 
> the start of the file (which confirm to GROMACS that this binary file is 
> indeed suitably-constructed .xtc trajectory data) are not correct. This 
> should not be caused merely by moving from big- to little-endian 
> architecture (or vice-versa), but if you generated it on a different 
> system to the one on which you're running g_covar, this would be a point 
> of interest.
> Mark
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