[FLASH-USERS] [EXT] Segmentation Fault (LaserSlab example)

[Marissa B. P. Adams]

Hi Simon!

As the error notes: "*executable file is not an executable*" so something
is off with your *flash4*, perhaps*.* Can you ls -ltr in your
*object/* directory
where you've performed the command ./flash4?  Do you see the permissions as
being executable?

When you set-up did it set-up "SUCCESS"fully? I am a fan of making my own
shell scripts for set-ups and then making my own object directory (e.g. emacs
LaserSlab-TestProblem.sh -nw contains the c&p below; then I make it an
executable chmod a+x LaserSlab-TestProblem.sh; then I just do
./LaserSlab-TestProblem.sh; this way everything is saved). Here is my
example set-up command for the LaserSlab problem:

./setup -auto LaserSlab -2d +cylindrical -nxb=16 -nyb=16 +hdf5typeio \

          species=cham,targ +mtmmmt +laser +uhd3t +mgd mgd_meshgroups=6 \

          -parfile=example.par -site=mbpadams -objdir=LaserSlab

Try simplifying your HDF5 shortcuts in the set-up command and make sure
that there is no space in "*+uhd3t*". Is there a reason you're forcing the
use of serial HDF5? You can also try setting this up with no HDF5 related
flags; it should (1) set-up (2) make and (3) run successfully. If the same
thing happens, can you make the *Sedov/* problem?

If that doesn't work then maybe there is an issue with the *Makefile.h*
you're using (flags probably) or something off with the installation of the
libraries you're using.

These are just my initial thoughts and I hope they are helpful in your
debugging.

Have a lovely day,
Marissa


On Wed, Aug 11, 2021 at 12:55 PM BolañOs, Simon <sbolanos at ucsd.edu> wrote:

> Hello everyone,
> When executing the Laser Slab example of Section 34.7.5, I got a
> Segmentation Fault, displayed below. Is someone got such a similar error
> during execution? How can I fix such an error?
> By the way here are the module that I turn on: *./setup -auto LaserSlab
>   -2d -nxb=16 -nyb=16 +hdf5 +io +serialIO species=cham,targ +mtmmmt +laser
> +u    hd3t +mgd mgd_meshgroups=6 -parfile=example.par *
>
> *Error message :*
>
>
>
>
>
> * Finished with Grid_initDomain, no restart  Ready to call Hydro_init
>  [Hydro_init]: Using non-Cartesian Geometry!  Hydro initialized  Gravity
> initialized  Initial dt verified  *** Wrote checkpoint file to
> lasslab_hdf5_chk_0000 ****  *** Wrote plotfile to lasslab_hdf5_plt_cnt_0000
> ****  Initial plotfile written  Driver init all done Program received
> signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace
> for this error: Could not print backtrace: executable file is not an
> executable #0  0x104270b17 #1  0x10426fbab #2  0x193edec43 zsh:
> segmentation fault  ./flash4 *
> Thank you in advance for your help,
> Simon.
>


-- 
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Marissa B. P. Adams
(she/her/hers)
Phd Candidate, University of Rochester
*E-mail:* madams at pas.rochester.edu
*Website:* https://www.pas.rochester.edu/~madams
<http://www.pas.rochester.edu/~madams#>
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