[mesa-users] Segmentation fault on the main sequence with a 1.2M star

[Max Katz]

As the error message indicates, the proximate problem is that the mesh
generation tried to generate more zones than max_allowed_nz, the upper
limit on the number of zones, which you have set in your inlist as 20,000.
So you can make that 'go away' by increasing that parameter in your inlist.
I will leave to others to diagnose why your run is requesting so many
zones, but will note that you can also mollify the problem by increasing
the value of mesh_delta_coeff which should decrease the number of zones
requested.

Max Katz
Ph.D. Candidate, Department of Physics and Astronomy
Stony Brook University
http://astro.sunysb.edu/mkatz/

On Sat, Feb 20, 2016 at 8:21 AM, Earl Bellinger <bellinger at mps.mpg.de>
wrote:

> Hello mesa users,
>
> I am using the newest version of mesa, r8118. I'm using an Eddington
> atmosphere, step overshooting, and inhibited diffusion. My inlist and
> the zams model I'm starting from is attached.
>
> I am getting the following error:
>
>
>  tried to increase number of mesh points beyond max allowed nz       20000
>
>  mesh_plan problem
>  doing mesh_call_number         832
>  s% model_number        1749
>
>  failed in do_mesh
>
> Program received signal SIGSEGV: Segmentation fault - invalid memory
> reference.
>
> Backtrace for this error:
> #0  0x2ACF71129557
> #1  0x2ACF71129B6E
> #2  0x2ACF71F8290F
> #3  0x9F357A in c_fill_dp_with_nans
> #4  0x9F31AA in __utils_nan_MOD_do_fill_with_nans_3d at utils_nan.f:89
> #5  0x9F0D5E in __utils_lib_MOD_fill_with_nans_3d at utils_lib.f:557
> #6  0x499B07 in do3 at alloc.f90:1766
> #7  0x499DA7 in __alloc_MOD_resize_star_info_arrays at alloc.f90:515
> #8  0x695576 in __adjust_mesh_MOD_remesh at adjust_mesh.f90:350
> #9  0x574982 in do_mesh at evolve.f90:1487
> #10  0x41533C in __star_lib_MOD_star_evolve_step at star_lib.f90:509
> #11  0x42B013 in __run_star_support_MOD_run1_star at run_star_support.f:124
> #12  0x4122C2 in __run_star_MOD_do_run_star at run_star.f:26
> #13  0x412314 in run at run.f:13
> ./rn: line 10: 22516 Segmentation fault      ./star
>
>
> This seems to crop up in about 0.5% of the runs that I am doing. Any
> advice?
>
> Thanks,
> Earl Bellinger
> Stellar Ages & Galactic Evolution Group
> Max-Planck-Institut für Sonnensystemforschung
>
> P. S. I apologize for the duplicate posting. I forgot I had to send
> it from this email address with HTML disabled. Moderators, please feel
> free to delete the other post.
>
>
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