| OPENW using /XDR (IDL 5.1/linux) WARNING! [message #12191] |
Fri, 10 July 1998 00:00 |
Russ Welti (on mapper
Messages: 9
Registered: January 1998
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Junior Member |
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The 5.1 online help for OPENW states that /XDR option is
basically obsolete but does NO harm to be present
(for backward compatibility).
But I finally found my problem in porting a huge IDL
application from my Solaris 5.0 IDL workstation
to my test linux box, and it was definitely due to
the presence of the /XDR on an OPENW statement.
I presume this is a bug, if it is not, i would very much
appreciate being contacted to tell me otherwise, so i
can maintain my IDL source code properly (i.e. single
copy of the source code, not both a 5.0 and a 5.1+ version)
Below, i have included a tiny example session where
the error is displayed.
IDL> print,path
/home/saga/geno/rwelti/ceph/C30-3AH/
IDL> openw,unit,path+"/tst.bin",/get_lun,/XDR
IDL> writeu,unit,float(1.0)
IDL> free_lun,unit
IDL> r=float(0.0)
IDL> openr,unit,path+"/tst.bin",/get_lun
IDL> readu,unit,a
IDL> help,a
A FLOAT = 4.60060e-41
% Program caused arithmetic error: Floating underflow
IDL> free_lun,unit
IDL> openw,unit,path+"/tst.bin",/get_lun <== NO /XDR here
IDL> writeu,unit,float(1.0)
IDL> free_lun,unit
IDL> r=float(0.0)
IDL> openr,unit,path+"/tst.bin",/get_lun
IDL> readu,unit,a
IDL> help,a
A FLOAT = 1.00000
Sincerely,
/
Russ Welti /-\
(c-g)
University of Washington \-/
Molecular Biotechnology /
PO Box 357730 /-\
Seattle, WA 98195 (a-t)
rwelti@u.washington.edu \-/
(206) 616 5116 voice (206) 685 7301 FAX /
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