[Mesa-users] Error in modelling for pp chain( ierr from write_star_job)

[Rob Farmer]

>There is a control on max age of the star, which I set to 1d17 years. What
does “dt_years_for_steps_before_max_age” signify? Does giving it a lower
value mean the running will be faster?

no if you look in the documentation (controls.defaults or you could even
try searching the code) this option controls the time before max_age when
mesa switches over to running smaller steps so that it can hit max_age
exactly

>(How can I make the mesa running process faster?(if possible))
Have more cores and thus run more threads on your machine, decrease the
space or time resolution (but you may become under resolved and results
will be garbage), or use a smaller a nuclear network. But its a trade off
between resolution (space/time/isotopes) and speed sometimes you just need
to let mesa run for a long time to get a good answer.

Rob





On Mon, 9 Jul 2018 at 17:17, Piyush Kumar via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Thanks… I’m getting plots.
>
> One more question:
> There is a control on max age of the star, which I set to 1d17 years. What
> does “dt_years_for_steps_before_max_age” signify? Does giving it a lower
> value mean the running will be faster?
> (How can I make the mesa running process faster?(if possible))
>
> On 09-Jul-2018, at 5:53 PM, Francis Timmes <fxt44 at mac.com> wrote:
>
> the issue is this inlist statement
>
>  save_star_job_namelist = .true.
>
> the default name of the file is
>
>  star_job_namelist_name = ''
>
> which is not a writable file, hence the error.
>
> you have two choices. either set
>
>  save_star_job_namelist = .false.
>
> or set the name of the file to write
>
>  save_star_job_namelist = .true.
>  star_job_namelist_name = ‘piyush.txt’
>
> fxt
>
>
>
>
>
> On Jul 9, 2018, at 7:53 AM, Piyush Kumar via Mesa-users <
> mesa-users at lists.mesastar.org> wrote:
>
> I tried to customise my model for basic pp chain reactions. I edited the
> profile_columns.list , history_columns.list and the required inlist, but
> the moment I entered the run command, it says:
>
>
> failed to open
> ierr from write_star_job
> STOP 1
>
>
> Attached are my edited profile, history_columns,inlist, inlist_project and
> inlist_pgstar.
> Some basic info: MacBook Air 2017, macOS 10.13.5(high Sierra), mesa
> sdk-2017, current version and mesa-r10398.
> Did I miss something important in my enlists or made a mistake?
>
> <history_edited.txt><profile_edited.txt><inlist><inlist_pgstar><inlist_project>
> Best,
> Piyush kumar_______________________________________________
> mesa-users at lists.mesastar.org
> https://lists.mesastar.org/mailman/listinfo/mesa-users
>
>
> _______________________________________________
> mesa-users at lists.mesastar.org
> https://lists.mesastar.org/mailman/listinfo/mesa-users
>
>
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