Dear David Indeed that was the error as I forgot to reinit the boundary_matrix which resolved the problem.Thanks alot for the explanation of the error as I was not able to make sense out of the error initially.
Regards Pushkar On Sat, May 8, 2021 at 10:14 PM Wells, David <drwe...@email.unc.edu> wrote: > Hi Pushkar, > > That error is usually a result of having a sparse matrix with no sparsity > pattern attached to it. Could you please verify that you attach sparsity > patterns to all the matrices you use in assembly? > > Best, > David Wells > ------------------------------ > *From:* dealii@googlegroups.com <dealii@googlegroups.com> on behalf of > pushkar...@gmail.com <pushkarpandi...@gmail.com> > *Sent:* Wednesday, May 5, 2021 12:16 AM > *To:* deal.II User Group <dealii@googlegroups.com> > *Subject:* [deal.II] Problem with Debugging step-26 program > > Deal deal.II community > > In my attempt to simulate the additive manufacturing process, I modified > the step-26 program to reproduce the results in which I ran into an error > which produces the output as : > > $ make run > Consolidate compiler generated dependencies of target step-26 > [ 66%] Built target step-26 > [100%] Run step-26 with Debug configuration > ***Time step 0 at t=0 > > =========================================== > Number of active cells: 1024 > Number of degrees of freedom: 99 > > > -------------------------------------------------------- > An error occurred in line <367> of file > </usr/local/include/deal.II/base/smartpointer.h> in function > T* dealii::SmartPointer<T, P>::operator->() const [with T = const > dealii::SparsityPattern; P = dealii::SparseMatrix<double>] > The violated condition was: > t != nullptr > Additional information: > (none) > > Stacktrace: > ----------- > #0 ./step-26: Step26::HeatEquation<2>::assemble_system() > #1 ./step-26: Step26::HeatEquation<2>::run() > #2 ./step-26: main > -------------------------------------------------------- > > make[3]: *** [CMakeFiles/run.dir/build.make:71: CMakeFiles/run] Aborted > (core dumped) > make[2]: *** [CMakeFiles/Makefile2:116: CMakeFiles/run.dir/all] Error 2 > make[1]: *** [CMakeFiles/Makefile2:123: CMakeFiles/run.dir/rule] Error 2 > make: *** [Makefile:137: run] Error 2 > I tried to debug with gdb but coudnt make track the error. So any help in > this regard to debug the code will prove beneficialMoreover,I have > attached step-26.cc file which was modified. > > Sincerely > Pushkar > > > > -- > The deal.II project is located at http://www.dealii.org/ > For mailing list/forum options, see > https://groups.google.com/d/forum/dealii?hl=en > --- > You received this message because you are subscribed to the Google Groups > "deal.II User Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to dealii+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/8afa57b5-ba7a-4f82-90c8-c37a01354513n%40googlegroups.com > <https://groups.google.com/d/msgid/dealii/8afa57b5-ba7a-4f82-90c8-c37a01354513n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- > The deal.II project is located at http://www.dealii.org/ > For mailing list/forum options, see > https://groups.google.com/d/forum/dealii?hl=en > --- > You received this message because you are subscribed to the Google Groups > "deal.II User Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to dealii+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/BN7PR03MB4356DDBFA61AF7E36D62D941ED569%40BN7PR03MB4356.namprd03.prod.outlook.com > <https://groups.google.com/d/msgid/dealii/BN7PR03MB4356DDBFA61AF7E36D62D941ED569%40BN7PR03MB4356.namprd03.prod.outlook.com?utm_medium=email&utm_source=footer> > . > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/CAKWKLQJb32xmBj%3DVQdrFYGcD05-fU-LF9d55iD5wE5nxqm4xiQ%40mail.gmail.com.
