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Meeting Minutes 2025-07-31
by Bill Gabella 31 Jul '25

31 Jul '25

Minutes for the Einstein Toolkit Meeting, 20250731. https://docs.einsteintoolkit.org/et-docs/Main_Page#Weekly_Users_Call 9am CDT Thursdays Present: Peter D, Leo W, Bill G, Deborah F, Maxwell R, Johnny T, Beyhan K, Hector I, Keith D, Yosef Z Chair Leo, Minutes Bill * BBH Gallery example (Zach and Peter) Peter, still not yet done, been too busy. * Unanswered Questions on the mailing list https://www.einsteintoolkit.org/tools/unanswered.php ** 25 July SimFactory placeholder macros. Confusion with the @XXX@ macros and where they are set and changed. ** 23 July Share Your Feedback... Seems that it should not be in our mailing list, refers to software and network tools(?). * Open Tickets https://bitbucket.org/einsteintoolkit/tickets/issues?status=open&status=new… #2773, CarpetX thorndoc confused in InterLatex.pl. Assigned to Steve. #2867, WaveToyX examples have HDF5 output error. Not assigned. #2866, Problem building ET on MN5: OpenCL (Marenostrum 5). Not assigned. #2764, PUGH tries to free memory not allocated by malloc. Assigned to Beyhan K. More work to be done. #963, Improve McLachlan accuracy. Original post 2012. Peter, we are trying to compare and see how it compares with NS simulations as well. * Tickets for Review https://bitbucket.org/einsteintoolkit/tickets/issues?status=new&status=open… Not much discussion. * Any Other Business ** Leo, question maybe for Steve, does anyone use the ET in clusters but through apptainer or singularity images? Steve does this. Leo is trying to do that and working with his cluster folks. Bill is also interested in that. Leo trying to setup with base layer that is operating system and then compilers and then external libraries, say external Lorene, and last a thornlist or par file. The last image would behave as ET would. Has it working locally but when tries with MPI on cluster with multiple nodes it hangs, problem with internode communication. Peter, Steve has been able to run MPI jobs with containers...maybe using the right MPI tools with Slurm to run them. ** Johnny, question also for Hector, variables needed for CCE Exporter. Want to use the CCE Export thorn, but do not write the time derivatives Lapse and Shift. Deborah, MacLachlan does write it back. Lean at Illinois, folks were working on something similar, Roland knows how to do this. Something about the time stepping. Hector, tried adding tensors to the Kranc file and stored them, whatever was done to write them to ADMBase, but see NaNs even though the evolution code does run normally. Maxwell, Baikal has a similar problem with dt_alpha and use the right hand side, some subtlety on the iteration, because what was saved is a fourth-order RK step. https://einsteintoolkit.org/thornguide/EinsteinAnalysis/CCE_Export/document… ** When is the developer hack-a-thon? Peter, maybe in two weeks. Next Meeting, Thursday, 7 August 2025. https://docs.einsteintoolkit.org/et-docs/Meeting_agenda fyi, bill gabella

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Issues Downloading einsteintoolkit.th and Running GetComponents
by Pahlavon Yovqochev 31 Jul '25

31 Jul '25

Dear Einstein Toolkit Support Team, I hope this message finds you well. My name is Pakhlavon Yovkochev, and I am a PhD student in astrophysics at the *Institute of Fundamental and Applied Research* in Tashkent, Uzbekistan. I am currently trying to install and learn how to use the Einstein Toolkit, as I plan to use it for modeling magnetic fields around black holes in my research. I am currently trying to set up the Einstein Toolkit on my system (Ubuntu, running via WSL2). However, I’ve encountered some issues during the process and would greatly appreciate your assistance. Steps I followed: 1. Cloned the CRL repository: git clone https://github.com/gridaphobe/CRL.gitcd CRL 2. Attempted to run: ./GetComponents --parallel https://raw.githubusercontent.com/gridaphobe/CRL/main/einsteintoolkit.th But I received the following error: Error: Couldn't download url https://raw.githubusercontent.com/gridaphobe/CRL/main/einsteintoolkit.th correctly 3. I confirmed that the file einsteintoolkit.th does not exist at that URL (returns 404). I also tried other versions, like ET_2024_05, but still encountered problems initially. 4. I then tried downloading the .th file directly using wget, but again received: ERROR 404: Not Found. 5. Additionally, when I created an empty einsteintoolkit.th file and ran: ./GetComponents --parallel einsteintoolkit.th I received: 0 components checked out successfully. My Question: Could you point me to the correct and currently supported .th file URL for the latest stable Einstein Toolkit release? Also, is there any change in the recommended installation procedure or repository structure that I should be aware of? Thank you very much in advance for your time and support. Best regards, *Pakhlavon Yovkochev*

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 30 Jul '25

30 Jul '25

Hello, Please consider joining the weekly Einstein Toolkit phone call at 9:00 am US central time on Thursdays. For details on how to connect and what agenda items are to be discussed, use the link below. https://docs.einsteintoolkit.org/et-docs/Main_Page#Weekly_Users_Call --The Maintainers

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 28 Jul '25

28 Jul '25

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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Issue with ReadInterpolate
by Luciano Combi 25 Jul '25

25 Jul '25

Hi people, I have used ReadInterpolate successfully for different applications in the past. I'm now trying to use it to interpolate onto a new grid that has 5 ghost zones i.e.: CoordBase::boundary_size_x_lower = 5 CoordBase::boundary_size_y_lower = 5 CoordBase::boundary_size_z_lower = 5 CoordBase::boundary_size_x_upper = 5 CoordBase::boundary_size_y_upper = 5 CoordBase::boundary_size_z_upper = 5 Driver::ghost_size = 5 GRHydro::GRHydro_stencil = 5 But I'm getting this error: CCTK_Proc569.err <== while executing schedule bin ReadInterpolate_ReadData, routine ReadInterpolate::ReadInterpolate_Read in thorn ReadInterpolate, file /home/mvxcombi/ET_Zelmani/Cactus/arrangements/EinsteinInitialData/ReadInterpolate/src/read.c:559: -> Skipping integer variable 'SPACEMASK::space_mask it=335925 tl=0 rl=0 c=569'. Do not know how to interpolate integers. ERROR from host bcn1814.usr.hlrn.de process 569 while executing schedule bin ReadInterpolate_ReadData, routine ReadInterpolate::ReadInterpolate_Read in thorn ReadInterpolate, file /home/mvxcombi/ET_Zelmani/Cactus/arrangements/EinsteinInitialData/ReadInterpolate/src/interpolate.cc:130: -> There were 70227 points in 27 variables that could not be set. cactus_etk_devel: /home/mvxcombi/ET_Zelmani/Cactus/arrangements/Carpet/Carpet/src/helpers.cc:275: int Carpet::Abort(const cGH*, int): Assertion `0' failed. Rank 569 with PID 1675935 received signal 6 Writing backtrace to AIC_interp/backtrace.569.txt The original grid has 3 ghost zones. I'm using the following parfile: # What to interpolate # ------------------- ReadInterpolate::files = "checkpoint.chkpt.it_335925" ReadInterpolate::max_number_of_read_variables = 30 ReadInterpolate::only_these_datasets = ":Y_e, :rho, :temperature, :vel, :Ax, :Ay, :Az, :psi6phi, :kxx, :kxy, :kxz, :kyy, :kyz, :kzz, :gxx, :gxy, :gxz, :gyy, :gyz, :gzz, :betax, :betay, :betaz, :alp" ReadInterpolate::minimum_reflevel = 0 # Default ReadInterpolate::maximum_reflevel = 1000 # Default # Interpolator settings # --------------------- ReadInterpolate::epsilon = 1.e-12 #2 # Default ReadInterpolate::interpolator_half_width = -1 # Default, use cctk_nghostzones ReadInterpolate::interpolator_name = "Lagrange polynomial interpolation" ReadInterpolate::interpolator_pars = " order = 3 boundary_off_centering_tolerance = {1. 1. 1. 1. 1. 1.} boundary_extrapolation_tolerance = {1.e-12 1.e-12 1.e-12 1.e-12 1.e-12 1.e-12} " # Fixing the read-in data # ----------------------- ReadInterpolate::shift_read_datasets_by[0] = 0. ReadInterpolate::shift_read_datasets_by[1] = 0. ReadInterpolate::shift_read_datasets_by[2] = 0. ReadInterpolate::enforce_symmetries_after_reading = no # Default ReadInterpolate::fix_cell_centered_origins = no # Default Any suggestions on how to solve this issue? Thanks a lot!!

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SimFactory placeholder macros
by IOSIF PANAGIOTIS 25 Jul '25

25 Jul '25

Hi, I have been following this document, https://einsteintoolkit.org/seminars/2022_02_24/index.html , to set up ET on my cluster, working also on some example configuration files. While preparing the submit and run scripts, I wanted to check the description of the @FOO@ macros that SimFactory uses. I checked these places but found no information. * https://simfactory.bitbucket.io/simfactory2/userguide/ (no mention of macros) * https://docs.einsteintoolkit.org/et-docs/Simulation_Factory_Advanced_Tutori… (1 mention of the @USER@ macro and a pointer to a section #Macros<https://docs.einsteintoolkit.org/et-docs/Simulation_Factory_Advanced_Tutori…> that seems missing) * https://docs.einsteintoolkit.org/et-docs/Configuring_a_new_machine (there is no information on the submitscript and runscript) So I would like to ask: If e.g. I have this line in my submitscript: #SBATCH -A @ALLOCATION@ Where is @ALLOCATION@ "read" from? My guess is that this is specified in the .ini file in this line: allocation = <project_account> Could you confirm if this is the case? Is there another source of documentation (that I might have missed) describing what these @FOO@ placeholders do? Best regards, Panagiotis ------------------- Panagiotis Iosif postdoctoral researcher Department of Physics, University of Trieste Via Alfonso Valerio 2, Trieste 34127 Italy -------------------

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meeting minutes for 2025-07-24
by Roland Haas 24 Jul '25

24 Jul '25

Present: Peter, Roland, Steve, Beyhan, Keith, Bill, Leo, Kruskal ET release ================== * no objections to Roland's proposal to merge changes required to build back to release branch * issues collected in https://bitbucket.org/einsteintoolkit/tickets/issues/2880/backport-external… BBH gallery example =================== * no updates from Peter or Zach Open tickets ============ * Leo will look into https://bitbucket.org/einsteintoolkit/tickets/issues/2874 * Yosef will look into https://bitbucket.org/einsteintoolkit/tickets/issues/2872 * Roland will try and contact Barry about https://bitbucket.org/einsteintoolkit/tickets/issues/2308 Yours, Roland -- My email is as private as my paper mail. I therefore support encrypting and signing email messages. Get my PGP key from http://pgp.mit.edu .

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 23 Jul '25

23 Jul '25

1 0

Share Your Feedback: SGX3 Gateway Catalog Survey
by Maytal Dahan 23 Jul '25

23 Jul '25

Dear Gateway Community Member, SGX3 leadership would like to invite you to participate in a brief survey to help shape the future of the SGX3 Gateway Catalog ( https://catalog.sciencegateways.org <https://catalog.sciencegateways.org>). Your input will guide improvements in features, support services, and outreach efforts to better meet the needs of the science gateway community. Follow this link to the Survey: Take the survey <https://utexas.qualtrics.com/jfe/form/SV_0Nis2b79nMn0je6?Q_DL=RGG7o0qI5V6cI…> Or copy and paste the URL below into your internet browser: https://utexas.qualtrics.com/jfe/form/SV_0Nis2b79nMn0je6?Q_DL=RGG7o0qI5V6cI… The survey should take no more than 5 minutes to complete. Thank you for contributing to the growth and impact of the SGX3 Gateway Catalog! For any additional questions, please email help(a)sciencegateways.org <mailto:help@sciencegateways.org> Best regards, Maytal Dahan Co-PI SGX3 Follow the link to opt out of future emails: Click here to unsubscribe <https://utexas.qualtrics.com/subscription/manage/confirmation?recipientId=C…>

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 21 Jul '25

21 Jul '25

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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