[Antelope] Steim Compression Error

[Dr. Kent Lindquist]

Hello Hank,

Not to imply that I'm promising to debug and fix this, but the next  
step that would be nice is to make a very small, completely self- 
contained data-set; make a tiny little program that runs on it to  
reproduce the error; then explain precisely how the output of the  
script differs from what you expect. Also exactly where and from what  
would you 'drop the first data-point'? From the input, the processed  
trace structure, or the output? The reproducible example might help  
someone in the community see exactly what's occurring and help you  
resolve resolve it.

Best regards,
Kent



On Nov 8, 2008, at 6:07 AM, Hank Ratzesberger wrote:

>
> Hi,
>
> We have a program that calls the library routine trapply_calib then  
> saves
> the data to a new database.
>
> We recently noticed that some resulting traces have point "artifacts"
> that are way out of range and looked further to find this message
> in our log files:
>
> trcopy_osx: The difference -2147483648 between 0 and -2147483648  
> near sample #0 cannot be represented in a Steim level 2 compressed  
> record
>
> The program is running on an Intel Mac running Leopard.
> We are running some more tests to see if the problem does not
> occur on other platforms.
>
> We do not fill gaps.  The problem occurs on files that have no gaps.
>
> Any thoughts on why we get this error and what we might do about it?
> We could always drop the first data point -- if we knew how.
>
> Thanks,
> Hank
>
>
> Hank Ratzesberger
> NEES at UCSB
> Institute for Crustal Studies,
> University of California, Santa Barbara
> 805-893-8042
>
>
>
>
>
>
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--
Dr. Kent Lindquist                     kent at lindquistconsulting.com
Lindquist Consulting, Inc.
59 College Rd. Suite #7
Fairbanks, AK 99701              Phone/FAX 907-457-2374

http://www.lindquistconsulting.com