[Mesa-users] hydro_solver_step returned ierr

[Farag, Ebraheem]

Hello Ahmet,

I ran your inlist, which begins with an initial model relaxation for creating the pre-main sequence model. After some initial convergence issues during the pre-main sequence relaxation (identical to your attached image), everything runs fine and all the .data files are produced as expected (after the relaxation is complete). Data files are not saved during the initial relaxation.

I can only imagine that if this output is different to the first time you ran your model, then you must have unknowingly tweaked something in your inlist.

-EbF
________________________________
From: Mesa-users <mesa-users-bounces at lists.mesastar.org> on behalf of Ahmet Cem Kutluay via Mesa-users <mesa-users at lists.mesastar.org>
Sent: Thursday, March 13, 2025 3:43 AM
To: mesa-users at lists.mesastar.org <mesa-users at lists.mesastar.org>
Subject: [Mesa-users] hydro_solver_step returned ierr

Hello!

I'm relatively new to MESA (I am using v24.08.1) and trying to evolve a ~0.899M_sun & Z=0.022 star from pms to sub giant branch.

Two days ago, I had an example run and everything went well, but today I got the following message, and afterwards, model starts to run but no history.data or profile*.data files were saved to the LOGS file.
[image.png]

I couldn't understand what was the problem because with the same parameters, I managed to run code without a warning/error until age = 1.7^10 yrs. In order for you to check my inputs, I added my inlist_project file to the attachments. I'm open to any suggestions.

Thank you from now.

Sincerely,
Ahmet

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