[SAC-HELP] Header seems byte-swapped -- byte-swap file and retry

[George Helffrich]

MacSAC expects all binary SAC files to be big-endian.  MacSAC's utility for byte swapping is called sactosac and is distributed with MacSAC.  You probably want to use the -m option, which will byte-swap files that aren't big-endian, irrespective of the processor type you're running on.

Usage: sactosac [-vfm] [sacfile(s)]
  -f - force conversion even if format is native for machine on
       which program is running.  Otherwise only converts files
       that are in a different format than desired for current
       machine.
  -m - force conversion to MacSAC (big-endian, Sun) byte-order.
  -v - verbose - describe what program is doing and what it is
       converting.

On 15 Mar 2010, at 21:50, Shahar Kadmiel שחר קדמיאל wrote:

> I have some SAC files produced by a code running on Linux (CentOS) with Xeon processors and when I try to read them from within SAC I get this message:
> 
> ERROR 1318: Header in disk file is out of date: (name of file)
> Header version number is incorrect.
> Header seems byte-swapped -- byte-swap file and retry
> 
> I am using MacSAC which I thought doesn't care if the file is little or big endian.
> I cannot find the sacswap tool that apparently is distributed with MacSAC.
> 
> The same code running on SUN machines produces SAC files which I have no problem reading.
> 
> What to do?
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          George Helffrich