[GEMPAK #KRY-826997]: garp in 5.10.4 crashes on simple plots

David,

I tracked the problem down to COMET's creation of a local 
$GARPHOME/gempak/ffdriv.f
modification of GEMPAK's supplied routine which now resides under
$GEMPAK/source/gemlib/gu/ffdriv.f.

Apparently COMET needed to comment out a GEPLOT statement which existed at one 
time, but
no longer is part of that routine since 1997! At any rate, the ffdriv.f call 
sequence 
to FGTBOX has evolved and the replacemnt routine is no longer correct or needed.

The solution is to remove the $GARPHOME/gempak/ffdriv.f routine
and remove it from the SPECIAL_FOBJS list in $GARPHOME/Makefile and
$GARPHOME/gempak/Makefile. Also remove any ffdriv.o files under 
$GARPHOME/gempak/${NA_OS}
and then relink GARP.

I'll update these mods into the updated distributions as soon as possible. In 
the mean time, 
I can send you updated binaries if needed.

Steve Chiswell
Unidata User Support


> David,
> 
> I'll take a look. Usually when crashes are this blatent, it is a
> change in the gemlib api that is missing in Garp, or a 32/64 bit problem.
> 
> Thanks for point this out. I'll get back to you this afternoon....
> 
> Steve Chiswell
> Unidata User SUpport
> 
> 
> > Hello,
> >
> > Garp has always been a flaky program, with random crashes, but in
> > 5.10.4 it's nearly unusable.  You can get the following:
> >
> > Segmentation fault (core dumped)
> >
> > extremely easily using the GFS003 grids and simply trying to make a
> > horizontal plot of Mixing Ratio, MIXR, at 500 mb for a single hour.
> > Same thing happens when trying to plot Temp_F at 500 mb, or when
> > plotting Absolute voriticity advection in the 850-500 mb layer under
> > the HAS entry in the Scalar menu.  I have tried 'limit stacksize 900M'
> > and 'unlimit stacksize' but neither helps.
> >
> > I have confirmed this with your binaries as well as my own, and have
> > confirmed that garp under 5.9.4 works fine with these grids which were
> > created with dcgrib2 (version 5.10.4) like this:
> >
> > set i = /home/disk/data/conduit/gfs.2007110700/gfs.t00z.pgrbf06
> > dcgrib2 -d - -m 20000 /tmp/gfs/2007110700_gfs003.gem < $i
> >
> >
> > David
> > --
> > David Ovens          e-mail: address@hidden
> > Research Meteorologist    phone: (206) 685-8108
> > Dept of Atm. Sciences      plan: Real-time MM5 forecasting for the
> > Box 351640                        Pacific Northwest
> > University of Washington          http://www.atmos.washington.edu/mm5rt
> > Seattle, WA  98195               Weather Graphics and Loops
> > http://www.atmos.washington.edu/~ovens/loops
> >
> >
> 


Ticket Details
===================
Ticket ID: KRY-826997
Department: Support GEMPAK
Priority: Normal
Status: Closed