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[ferret_users] Attributes and packed data



Hi all,

I'm trying to manipulate spatial subsets created with NCO-ncks command
on the global Pathfinder SST files provided by JPL. The idea is to keep
the original packed format. However, despite creating the output, ferret
is issuing the message "Segmentation fault" when it quits and the packed
output is not equal to the original data. I'm attaching the test data I
created to try to understand what was going on. Any hints on how to
handle the variable attributes are welcomed. 

Thanks.

$ ls -l test_att*
-rw-rw-r-- 1 pbo pbo 455076 2010-01-06 17:03 test_att_in.cdf
-rw-rw-r-- 1 pbo pbo    252 2010-01-06 16:14 test_att.jnl

---------------- output from test_att.jnl
$ ferret
 	NOAA/PMEL TMAP
 	FERRET v6.401  
 	Linux(g77) 2.4.21-57.ELsmp - 12/09/09
 	 6-Jan-10 17:13     

yes? go test_att
 ! NOAA/PMEL TMAP
 ! FERRET v6.401
 ! Linux(g77) 2.4.21-57.ELsmp - 12/09/09
 !  6-Jan-10 14:43
 
use test_att_in.cdf
 
save/file=test_att_float.cdf/clob sst
 LISTing to file test_att_float.cdf
 
set att/output=all sst
set var/outtype=input sst
 
save/file=test_att_short.cdf/clob sst
 LISTing to file test_att_short.cdf
Segmentation fault

----------------------------------------------------
$ ls -l test_att*
-rw-rw-r-- 1 pbo pbo 602976 2010-01-06 17:13 test_att_float.cdf
-rw-rw-r-- 1 pbo pbo 455076 2010-01-06 17:03 test_att_in.cdf
-rw-rw-r-- 1 pbo pbo    252 2010-01-06 16:14 test_att.jnl
-rw-rw-r-- 1 pbo pbo 311476 2010-01-06 17:13 test_att_short.cdf

-------------------------- Comparison between input and *short* 
$ ferret
 	NOAA/PMEL TMAP
 	FERRET v6.401  
 	Linux(g77) 2.4.21-57.ELsmp - 12/09/09
 	 6-Jan-10 17:15     

yes? use test_att_in.cdf
yes? use test_att_short.cdf
yes? shade sst[d=1]-sst[d=2]
 *** NOTE: Ambiguous coordinates on X axis: SST[D=1]-SST[D=2]
yes? set mode meta
yes? shade sst[d=1]-sst[d=2]
yes? canc mode meta
yes? sp gksm2ps -p portrait -o tmp.ps metafile.plt
yes? sp convert tmp.ps test_att_dif.jpg


 ! NOAA/PMEL TMAP
 ! FERRET v6.401  
 ! Linux(g77) 2.4.21-57.ELsmp - 12/09/09
 !  6-Jan-10 14:43     

use test_att_in.cdf

save/file=test_att_float.cdf/clob sst

set att/output=all sst
set var/outtype=input sst

save/file=test_att_short.cdf/clob sst

Attachment: test_att_float.cdf
Description: Cdf file

Attachment: test_att_in.cdf
Description: Cdf file

Attachment: test_att_short.cdf
Description: Cdf file

Attachment: test_att_dif.jpg
Description: JPEG image


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