[Users] Meeting Minutes for 2026-04-09

[Lucas Timotheo Sanches]

Attendees: Peter Diener, Lucas T. Sanches (minutes), Steven R Brandt (chair),
           Roland, Jordan Nicoules, Cheng Hsin Cheng, Maxwell Rizzo,
           Nikolai Wallin.

# Pre agenda topics

Because Jordan joined, we started discussing issue 2927. He found a bug with
GCC versions. Steve thinks that this is due to a bug when CST gets generated
into code. He says he should be able to find the problem.

We also discussed issue 2912, due to the Llama inconsistent volume forms.
Jordan says he has a fix for the issue though, so he promised to send a PR to
fix it soon.

# ET_2026_05 release

## Gallery runs

- The BH-NS gallery example is done now.
- No other gallery runs have started.

## Test suite runners

- Anvil and Sunrise are giving problems on multiple thorns:
1. CCE export. Peter looked at the failures. Two HDF5 are generated but the
   test suite obviously cannot compare binaries, so it relies on a python
   script. It's likely that Python is the root issue here.
2. CanudaX NP Scalars
3. CottonmouthBSSNOK.

TwoPuncturesX is failing everywhere. Steve says the tests should be updated.
Some tests require matter, which we don't have for CarpetX on the release.

## Thorn Reviews

- BHaHAHA: Peter wants to create a par file with it included so he can
 understand all the options. Zach says he would like to chat about it
 and Peter wants to include it in SPHINCS BSSN.

- Boost: Peter tried to download and put it in his thornlist, but it is failing.
  Roland says we should actually decide what we are going to provide from boost.
  So far, it seems we need System, file system, math, parameter parsing, and
  FUKA also needs python, but that will be a headache.

- Cottonmouth: Lucas presented some prelim. results of a new Z4c recipe.
  Steve stated our intention to have this thorn proposed for inclusion.
  Steve also presented timing results.

# ET Workshop at UIUC

- Registration is open.
- Speakers have been invited. Many have responded.

# Atlassian ticket migration

- No updates as of yet, we still have time.

# Kyoto initiative

- IllinoisGRMHD had volunteers on their behalf. Zach is going to meet with
  them to discuss details. They may join next ETK call

# Mailing list questions

- Bug in QuasiLocalMeasures: Jordan will let his collaborator make a ticket.
- Range error setting parameter, on cluster: Jordan discussed this during the
  start of the call. A ticket will be made about it

# Tickets

- 2928: Steve asked the community's opinion on adding a gpu option to
  simfactory. Lucas and Cheng-Hsin would like that.
- 2923: Maybe upgrading ADIOS2 fixes the issue, but Cheng-Hsin had not
time to test it yet.
- 2910: Apply.
- 2921: Cheng-Hsin has further comments, he will add it.