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Re: gfortran.

Steve,

I spoke too soon.
This is on a RHEL clone (CentOS v4.5), with gcc version 4.1.1 20070105 (Red Hat 4.1.1-53). 

I compiled with gfortran.

gddiag seg faults on computations (replicates every time):

gddiag << end_gddiag
GDFILE   = /data/ldm/gempak/model/ruc2236/2007082312_ruc2236.gem
GDOUTF   = temp.gem
GFUNC = sub(add(sub(TMPC@850,TMPC@500),DWPC@850),sub (TMPC@700,DWPC@700)) 
GDATTIM  = 070823/1200F001
GLEVEL   = 0
GVCORD   = PRES
GRDNAM   = KINDX@0%NONE^070823/1200F001
GRDTYP   =
GPACK    =
GRDHDR   =
PROJ     =
GRDAREA  =
KXKY     =
MAXGRD   =
CPYFIL   =
ANLYSS   =
RUN

 19823 Segmentation fault      gddiag  << end_gddiag
I took this system off-line, recompiled with g77, and the seg faults went away. FYI. The g77 was 3.4.6.
Incidently, this same "feature" does NOT appear on the Gentoo system, compiled with gfortran 4.1.2. As a whole, we tend to have a lot less problems on Gentoo than the other distributions. This particular problem has only appeared on the RHEL clone, thus far. 

Stonie