Problem with NAG D02EBF stiff systems routine (help)

Article View: sci.math.num-analysis

Article #332

Back to sci.math.num-analysis Previous Next

#332

From: Allan Longley
Date: Tue, 25 Aug 1992 20:36

18 lines
1263 bytes

Hello, I hope you can help.

I am using the NAG library routine for integrating a stiff system of
ordinary differential equations D02EBF.  The routine is called multiple 
times in the code with the same initial state, but is returning different 
answers ...  very different answers!  I even reset the work-space array
W(iw) before each use of D02EBF.

I am programming in FORTRAN77 with NAG Mark14B in AIX on an IBM R6000.  

This is not good.  Can you help?  Please.

-----------------------------------------------------------------------------
Allan Longley, University of Waterloo, Department of Chemical Engineering
e-mail: alongley@cape.uwaterloo.ca
voice: (519) 885-1211 x3816
home: (519) 746-5747
------------------------------------------------------------------------------

Technical Details

Message-ID: <BtK3xJ.253@watserv1.uwaterloo.ca>

Path: arc1-ca.pugleaf.net!sparky!uunet!usc!cs.utexas.edu!torn!watserv2.uwaterloo.ca!watserv1!cape.UWaterloo.ca!alongley

Show Full Headers

Complete Article Headers

Newsgroups: sci.math.num-analysis
Path: arc1-ca.pugleaf.net!sparky!uunet!usc!cs.utexas.edu!torn!watserv2.uwaterloo.ca!watserv1!cape.UWaterloo.ca!alongley
From: alongley@cape.UWaterloo.ca (Allan Longley)
Subject: Problem with NAG D02EBF stiff systems routine (help)
Message-ID: <BtK3xJ.253@watserv1.uwaterloo.ca>
Originator: alongley@cape.UWaterloo.ca
Sender: news@watserv1.uwaterloo.ca
Organization: University of Waterloo
Date: Tue, 25 Aug 1992 20:36:54 GMT
Lines: 18