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

[Earl Bellinger]

Hi Max, thanks for your suggestion. I do adjust mesh_delta_coeff, but
larger values can introduce other problems too.

To anyone interested, the seg fault appears to go away if I don't use
the (noted to be experimental) convective_bdy_weight option, so maybe
that's a hint of where the problem is cropping up.

Best regards,
Earl Bellinger
Stellar Ages & Galactic Evolution Group
Max-Planck-Institut für Sonnensystemforschung


On Sat, Feb 20, 2016 at 5:44 PM, Max Katz <maxpkatz at gmail.com> wrote:
> 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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