Dear Professor Bangerth,
Thanks for your response. Yes, I did. As I mentioned, I got a backtrace in
the debugger (eclipse) and I find out that the problem is in the line I
have mentioned but I couldn't find out what's the problem in that line of
the code which causes segmentation violation.
Best,
Ehsan
On Sunday, July 3, 2016 at 4:32:16 PM UTC-5, bangerth wrote:
>
> On 07/03/2016 03:50 PM, Ehsan Esfahani wrote:
> > Dear All,
> >
> > Greetings. I changed step-25 (minor changes) in order to solve my
> problem. Now
> > I want to change this code for parallel computation based on the method
> > mentioned in step-40. I got several errors and solved them one by one
> but the
> > following error:
> >
> > /Number of active cells: 1024
> > // Total number of cells: 1365
> > //{[0,4224]}//
> > //Time step #1; advancing to t = 0.1.
> > [...]
> > //[0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation
> Violation,
> > probably memory access out of range
> > [...]
> >
> > /
> > /
> > Eclipse gives me a backtrace in the following line of the code:
> > / solver.solve (system_matrix,
> completely_distributed_solution_update,
> > system_rhs,/
> > / preconditioner);/
> > I have no idea why I got this error. The code is running properly for
> /fe(1)
> > /and /n_global_refinements (4)/ but when I change them to /fe(2)/ and
> > n_global_refinments (4) I got that error related to /Segmentation
> Violation.
> > /Do you know what's going on? Also, I have attached the code here .
> Thanks in
> > advance for your help.
>
> Ehsan,
>
> segmentation violations (SEGV) are typically easy to debug because you can
> get
> a backtrave in the debugger of the exact place where it happens, and you
> can
> then look at the local variables to see why this may have happened. Have
> you
> tried to run the program in a debugger and see what is going on?
>
> Best
> W.
>
> --
> ------------------------------------------------------------------------
> Wolfgang Bangerth email: bang...@math.tamu.edu
> <javascript:>
> www: http://www.math.tamu.edu/~bangerth/
>
>
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