Julian, In my opinion, most probably, this might be a problem of pointers, some compiler do protect NULL pointers that you would like to extract but some other might not. Check if this helps.
All the best, Xiaoyu On Thu, Dec 23, 2010 at 08:29, Julian <[email protected]> wrote: > Hello, > > I have a code using preconditioned (SSOR) CG that converges (in <500 > iterations) in one system (32 bit, Ubuntu 9.10, gcc 4.4.1, no threading, > deal.II 6.2.1), but fails to converge (in 10,000 iterations) in another > system (4 bit, RedHat 4, gcc 4.4.2, no threading, deal.II 6.3.1). Has > anyone run into a similar problem or might otherwise know what the problem > could be? > > In a nutshell my code: > - is a derivation of the Step 8 tutorial for linear elastic analysis > - uses the cell user_index to point to a vector of scalars that weight each > cell stiffness matrix (I am doing topology optimization) > - uses the periodic-constraints.h module provided in a previous posting of > this list to impose periodic boundary conditions. > > Thanks in advance for any help you could provide! > > -Julian > > > _______________________________________________ > dealii mailing list http://poisson.dealii.org/mailman/listinfo/dealii > >
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