Re: [ferret_users] Bug in ferret 6.6.2

[Andrew Wittenberg <Andrew.Wittenberg@xxxxxxxx>]

Hi Martin,

Indeed, there does seem to be a bug somewhere, at least for some recent 
versions of Ferret.  Interestingly, on our Linux (i686) RHEL5 platform, I 
actually get a valid result in v6.62:

        NOAA/PMEL TMAP
        FERRET v6.62
        Linux rh5 (gfortran) 2.6.18-164.11.1.el5 - 06/11/10
        18-Aug-10 11:31

yes? use levitus_climatology
yes? list/x=12:15/y=-22/z=0:50 temp[x=@ave,z=@ave]
             VARIABLE : TEMPERATURE (DEG C)
             FILENAME : levitus_climatology.cdf
             FILEPATH : /net/atw/ferret/exe/i686/ferret-6.6/fer_dsets/data/
             LONGITUDE: 12E to 15E (XZ ave)
             LATITUDE : 22.5S
             DEPTH (m): 0 to 50 (XZ ave)
          15.47

However, I get a "missing" result in v6.61 on our Altix (ia64) SLES10 
platform:

        NOAA/PMEL TMAP
        FERRET v6.61
        Linux(g77) 2.6.16.60-0.35 ia64-sles10 - 05/20/10
        18-Aug-10 11:33

yes? use levitus_climatology
yes? list/x=12:15/y=-22/z=0:50 temp[x=@ave,z=@ave]
             VARIABLE : TEMPERATURE (DEG C)
             FILENAME : levitus_climatology.cdf
             FILEPATH : /net/atw/ferret/exe/ia64/ferret-6.6/fer_dsets/data/
             LONGITUDE: 12E to 15E (XZ ave)
             LATITUDE : 22.5S
             DEPTH (m): 0 to 50 (XZ ave)
        ....

Though if I create the average like this, it works:

yes? let a = temp[x=12:15@ave,y=-22]
yes? list a[z=0:50@ave]
             VARIABLE : TEMP[X=12:15@AVE,Y=-22]
             FILENAME : levitus_climatology.cdf
             FILEPATH : /net/atw/ferret/exe/ia64/ferret-6.6/fer_dsets/data/
             LONGITUDE: 12E to 15E
             LATITUDE : 22.5S
             DEPTH (m): 0 to 50 (averaged)
          15.47

Ansley, could this perhaps be related to the fix for bug 1735?

Andrew


On Wed, 18 Aug 2010, Martin Schmidt wrote:

> Hi all,
> I am trying to use ferret 6.6.2, but it reveals a bug.
> ferret
> starting Ferret on hd3
>       NOAA/PMEL TMAP
>        FERRET v6.4
>        Linux(g77) 2.6.9-89.ELsmp - 11/30/09
>        18-Aug-10 14:29
> yes? use levitus_climatology
> yes? list/x=12:15/y=-22/z=0:50 temp[x=@ave,z=@ave]
>             VARIABLE : TEMPERATURE (DEG C)
>             FILENAME : levitus_climatology.cdf
>             FILEPATH : /sw/viz/ferret/fer_dsets/data/
>             LONGITUDE: 12E to 15E (XZ ave)
>             LATITUDE : 22.5S
>             DEPTH (m): 0 to 50 (XZ ave)
>          15.47
> This average includes some coastal points with missing values. The result is 
> fine.
>
> Now with 6.6.2
>
> ferret
> starting Ferret on hd3
>        NOAA/PMEL TMAP
>        FERRET v6.62
>        Linux(gfortran) 2.6.9-89.0.20.ELsmp - 06/11/10
>        18-Aug-10 14:30
>
> yes? use levitus_climatology
> yes? list/x=12:15/y=-22/z=0:50 temp[x=@ave,z=@ave]
>             VARIABLE : TEMPERATURE (DEG C)
>             FILENAME : levitus_climatology.cdf
>             FILEPATH : /sw/viz/ferret/fer_dsets/data/
>             LONGITUDE: 12E to 15E (XZ ave)
>             LATITUDE : 22.5S
>             DEPTH (m): 0 to 50 (XZ ave)
>        ....
>
> Nothing is found. The same problem is encountered with other data sets from 
> model results.
>
> Greetings,
> Martin Schmidt