[Mesa-users] Low mass diffusion failure with remaining_source_mass

[Saida Milena Diaz Castillo]

Dear,

Thank you for your email. I’m out of the office for the holidays from 3rd of April until 12th of April. I’ll reply to your email as soon as I can upon my return.

Cheers,

On 7. Apr 2023, at 23:06, Evan Bauer via Mesa-users <mesa-users at lists.mesastar.org> wrote:

> Hi Ben,
> 
> I'd be very interested in trying to help debug this. I don't think I've ever run across this particular failure mode of diffusion before, and I thought I had collected most of them by this point! Can you attach the starting model? Right now trying to run your inlists to reproduce the failure gives me
> 
> 	failed to open MODELS/1Gyr/1Gyr_010M_Z_000018_w001.mod
> 
> Cheers,
> Evan
> 
> On Apr 7, 2023, at 1:07 PM, Roulston, Benjamin via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> Hello,
> 
> I’m having an issue trying to evolve some lower mass stellar models from 1Gyr to TAMS (or 14Gyr). They seem to proceed normally, but then abruptly fail with the following message
> 
> remaining_source_mass           1         136         136                       NaN    4.2369868473723005D+25    4.2369868473723005D+25
> 
> I think this has something to do with diffusion, but I’m not are exactly what issue is happening to cause the run to fail. I looked in star/private/diffusion_procs.f90 around line #749, and this is seeming to say that the remaining_source_mass value is NaN. I’m still looking deeper to see if I can figure out where this is coming from, but if anyone who knows more has any help that would be great!
> 
> For reference, I’m doing a grid in mass from 0.1Msun to 0.9 Msun. Using the same exact inlist except for the mass, all of the models run EXCEPT the 0.1Msun, the lowest mass case. 
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> I am using MESA 22.10.1 and also using the SDK (mesasdk-aarch64-macos-22.10.1). MESA builds and runs fine. I include the output from MESA as an attachment. As well as the inlists used.
> 
> Cheers,
> - Ben
> <MESA_output.txt><inlist><inlist_1Gyr_TAMS><inlist_pgstar><history_columns.list><profile_columns.list><run_star_extras.f90>_______________________________________________
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> 
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