Users June 2026

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13 participants
22 discussions

ET Simulation Error
by MAKINO Taiki 15 Jun '26

15 Jun '26

Dear Einstein Toolkit Team I am a new Einstein Toolkit user and have a simulation error. I can run DNSdata_test.par with GRHydro, but I cannot run it when I switch GRHydro to IllinoisGRMHD. In detail, I changed the activethorns from GRHydro to IllinoisGRMHD, and added some activethorns such as GRHayLib, GRHayL and GRHayLHD. In addition, I commented out parameters of GRHydro like “GRHydro::sources_spatial_order”. And, I wrote HydroBase::evolution_method = "IllinoisGRMHD”. The error message is as follows: “WARNING level 0 from host hubble process 22 in thorn Cactus, file /data/usr/Cactus/configs/sim/build/Cactus/main/SetParams.c:93: -> CCTKi_SetParameter: Error at line 36 in parameter file /data/usr/sim_Result/test_BNS_GW_Piecewise4_Cactus_Illinois8/output-0000/DNSdata_test.par while activating thorns” Also, one of participants of the Einstein Toolkit workshop advised that I had to activate DNSdata which I had commented out and to comment out parameters of thorns which I did not activate. After making these changes, a different error appeared. It is the following: WARNING level 0 from host hubble process 0 in thorn Cactus, file /data/usr/Cactus/configs/sim/build/Cactus/main/SetParams.c:93: -> CCTKi_SetParameter: Error at line 37 in parameter file /data/makino/test_BNS_GW_Piecewise4_Cactus_Illinois9/output-0000/DNSdata_test_copy.par while activating thorns. The list of activated thorns is provided below for reference: ActiveThorns = "Boundary CartGrid3D CoordBase Fortran InitBase IOUtil LocalReduce SymBase Time" ActiveThorns = "AEILocalInterp" ActiveThorns = "MoL Slab SpaceMask SphericalSurface" ActiveThorns = "Carpet CarpetInterp CarpetInterp2 CarpetIOASCII CarpetIOHDF5 CarpetIOScalar CarpetLib CarpetIOBasic CarpetReduce CarpetRegrid2 CarpetSlab CarpetTracker CarpetMask LoopControl" ActiveThorns = "Formaline" ActiveThorns = "HTTPD Socket" ActiveThorns = "NaNChecker TerminationTrigger TimerReport" ActiveThorns = "ADMbase ADMcoupling ADMmacros CoordGauge StaticConformal" ActiveThorns = "RotatingSymmetry180 ReflectionSymmetry" ActiveThorns = "Constants TmunuBase HydroBase " ActiveThorns = "QuasiLocalMeasures" ActiveThorns = "EOS_Omni" ActiveThorns = "GRHayLib" ActiveThorns = "GRHayL" ActiveThorns = "IllinoisGRMHD" ActiveThorns = "SummationByParts" ActiveThorns = "GenericFD NewRad" ActiveThorns = "ML_BSSN ML_BSSN_Helper ML_ADMConstraints" ActiveThorns = "Hydro_Analysis" ActiveThorns = "Dissipation" ActiveThorns = "DNSdata" ActiveThorns = "GRHayLHD” The line reported in the second error (line 37) corresponds to: ActiveThorns = "GRHayLHD" Am I missing any required thorns, parameter settings, or something else for using IllinoisGRMHD with DNSdata_test.par? Thank you very much for your time and assistance. I have attached the parameter file for reference. If any additional information would be helpful, I would be happy to provide it. Best regards, Taiki Makino Graduate School of Science, Nagoya University makino.taiki.g6(a)s.mail.nagoya-u.ac.jp 取得 Outlook for Mac<https://aka.ms/GetOutlookForMac>

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meeting minutes for 2026-06-11
by Roland Haas 11 Jun '26

11 Jun '26

Present: Roland, Steve, Peter, Max, Deborah, Noora, Yuvraj, Zach Chair: Deborah Minutes: Roland ET release ========== * timeline * gallery ** BBH test gives large CoM drift on either Stampede3 or Unity ** needs to be checked, would be critical for release ** suggest to try 2025 version of TwoPunctures * Noora is running axidilaton gallery example now * testsuites ** Derivs tests fail with error code 255, finds NaN but only for order 4 and higher * sunrise failures, may be due to postprocessing code. Seems fixable by removing a line of code ** CanudaX has significant differences ** SpherePUGH has differences * votes for final inclusion next meeting: CanudaX, Cottonmouth, Boost, TwoPuncturesX (post investigation of BBH gallery issues) * votes for inclusion that passed: Bhahaha, BHNS gallery example ET summer school and workshop ============================= * If presenting a tutorial, please send any notebooks / data you would like to use to Steve ASAP, by uploading to the tutorial server and pointing him to the location * data files can be hosted in your $HOME, make sure to set permissions, `chmod -R ugo+rX $HOME` 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 10 Jun '26

10 Jun '26

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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Silo Compilation Error
by Leonardo Werneck 09 Jun '26

09 Jun '26

Hi all, I've been trying to improve GRHayL's CI, and while trying to build the Einstein Toolkit's master thornlist in a container image, I got the following error: ``` #11 1164.3 ../../../tools/silock/silock.c: In function ‘updateProgress’: 29704 #11 1164.3 ../../../tools/silock/silock.c:183:20: error: storage size of ‘timeZone’ isn’t known 29705 #11 1164.3 183 | struct timezone timeZone; 29706 #11 1164.3 | ^~~~~~~~ 29707 #11 1164.3 make[7]: *** [Makefile:540: silock.o] Error 1 29708 #11 1164.3 make[6]: *** [Makefile:486: all-recursive] Error 1 29709 #11 1164.3 make[5]: *** [Makefile:545: all-recursive] Error 1 29710 #11 1164.3 make[4]: *** [Makefile:477: all] Error 2 29711 #11 1164.3 make[3]: *** No rule to make target '/opt/et-build/et-gcc/configs/sim/scratch/done/Silo', needed by 'silo.cxx.o'. Stop. 29712 #11 1164.3 make[2]: *** [/opt/et-build/et-gcc/lib/make/make.thornlib:113: make.checked] Error 2 29713 #11 1164.3 make[1]: *** [/opt/et-build/et-gcc/lib/make/make.configuration:179: /opt/et-build/et-gcc/configs/sim/lib/libthorn_Silo.a] Error 2 29714 #11 1164.3 make[1]: *** Waiting for unfinished jobs.... ``` It appears that `struct timezone` is legacy C. Has anyone encountered this before and/or know how to deal with it? I've been using the latest gcc on Ubuntu 24.04, for completeness. Thanks! Leo

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 08 Jun '26

08 Jun '26

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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Question about schedule options
by Jordan Nicoules 05 Jun '26

05 Jun '26

Hi all, I have a question about scheduling routines in the analysis bin, more particularly about the options you can provide. Is there any downside in scheduling a function as "global-early loop-local", compared to the default "local"? Like a loss of performance, for instance if there end up being multiple such functions without non-trivial order? My issue is, Trigger::Trigger_Check is scheduled as global-early, but I would like to compute GFs before (and reductions, but that is not the problematic part). The "before" directive seems to only properly apply if I make my routine "global-early loop-local", which I can understand. If there's no additional overhead, I don't mind changing the options of my routine. If it may turn out to have impact on performance, I may prefer to introduce conditional statements or find other workarounds. Best, Jordan

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Automatic termination trigger mid-run
by Jordan Nicoules 04 Jun '26

04 Jun '26

Dear all, I was wondering if there was a built-in way to trigger the termination of a simulation when something specific happens, along the lines of what Trigger does to steer quantities. From what I understand, Trigger does not offer that possibility, and TerminationTrigger checks either a file or a time limit. What I'm considering would be more along the lines of "an apparent horizon is found so trigger termination", in order to steer some parameters at recovery. If there's no such explicit way, I'm happy to try to implement that in Trigger. I actually have ideas of other small improvements to Trigger that I could try contributing as well (namely, increase the maximum number of triggers and allow one trigger to have multiple consequences at once). Unfortunately I won't be able to join the weekly call today to discuss this directly. Best, Jordan

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Question about restarting a simulation from checkpoint data
by Jorge Yahir Mio 04 Jun '26

04 Jun '26

Dear Einstein Toolkit users, I am currently working with the Einstein Toolkit and trying to use checkpoint/restart functionality to recover simulations. I understand the parameters that must be included in the parameter file, but I am not sure how I should correctly restart a simulation from existing checkpoint data. So far, I have been launching simulations with commands such as ./simfactory/bin/sim run ProcaStar -workstation-parfile=par/ProcaStar.par and the simulation runs correctly and generates checkpoint files. However, when I try to restart from the checkpoint data, I am unsure what the correct procedure should be. I do not know whether I should use a different SimFactory command, modify the submission procedure, or provide additional options. The checkpoint-related parameters in my parameter file are: CarpetIOHDF5::checkpoint = yes IOUtil::checkpoint_every_walltime_hours = 0.1 IOUtil::checkpoint_dir = "checkpoints_prueba" IOUtil::checkpoint_keep = 1 IOUtil::checkpoint_ID = no IOUtil::checkpoint_on_terminate = yes IOUtil::recover = "autoprobe" IOUtil::recover_dir = "checkpoints_prueba" IOUtil::abort_on_io_errors = yes CarpetIOHDF5::open_one_input_file_at_a_time = yes Could someone please clarify the recommended procedure for restarting a simulation from existing checkpoint files? In particular: 1. Which SimFactory command should be used to restart a simulation? 2. Is it necessary to create a new run or continue the existing one? 3. Are there any additional parameters or directory requirements for recovery to work correctly? My environment is: Einstein Toolkit version: ET_2025_05 Operating system: Linux Ubuntu 22.04.5 LTS Cluster/machine: Local Thank you very much for your help. Best regards, Yahir Mio

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Meeting Minutes for 2026-06-04
by Lucas Timotheo Sanches 04 Jun '26

04 Jun '26

Attendees: Lucas (minutes), Peter Diener, Roland Hass (chair), Beyhanm, Deborah Ferguson, Johnny Tsao, Maxwell Rizzo, Nikolai Wallin, Noora Ghadiri, Zach Etienne # ET_2026_05 release ## Gallery runs - Debporah's run: Something is wrong with the stampede build, her student ran and the trajectories were off. She's also having trouble with the derivatives - Johnny is encountering a difference when running his (Poisson equation). He says if he uses the number of processes Steve used he gets different results, if he uses 1 he gets the same results. He sees a left to right shift. Roland says that if the thing gets shifted to the right its OK, its taking a couple of iterations longer to converge. - Noora reports having some allocation issues but promises to have it done by next week. ## Test suite runners - Deborah is debuging on stampede 3. No luck yet. Will report back. - Cottonmouth fails on sunrise and cosma, but the info is outdated, thorns have had updates. The test runners will try again. - Noora reports all tests passing on frontera, but have not updated the webpage yet. - McLachlan fails on delta, queen bee and sunrise. Peter concludes it was a tolerance issue, he will update the tests and the test page. - Checkpoint failing on delta, anvil and expense. Roland asks for log files for this specific failure and will look at them. - TwoPuncturesX fails on delta. Cheng-Hsin is defending, so Lucas and Noora will coordinate to see who has more time and try to run there. ## Thorn Reviews - Bhahaha: Will have a vote next weeks for final inclusion. - CanudaX: vote in 2 weeks or after. - Cottonmouth: Zach is reviewing the Einstein Engine repo, he will have a list of updated issues soon. - Boost: Its in, some people have been using it already, no issues so far. Up for vote next week. - TwoPuncturesX: Approved, up for vote next week, # ET Workshop at UIUC - Its happening! - Total participant numbers is about 100 people, with 50 in person and 50 online - The tutorial server boss (Steve) is away so for now you are on your own. # Mailing list questions - Jordan asks about termination functionality. Roland will respond to him on the mailing list. # Tickets 2916: New issues for Cottonmouth Review. 2952: 2950: We can't do point 3 before doing point 1, because we don't have conditional storage yet. 2944: Roland suggests splitting up the issue list in more than one ticket. Because this thorn is very close to Multipole, many of the issues pointed out here should also be fixed on that thorn. 2949: C23 reserves the bool keyword, and the flesh requires some changes. 2948: Requires conditional storage.

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 03 Jun '26

03 Jun '26

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