---
name: DIALS core meeting 2024-01-11
tags: core meeting
---

# DIALS core meeting 2024-01-11

## Previous Actions

- [ ] **ND**: PR to remove `std::string` support for messagepack from dials code
- [ ] **ND** Investigate getting `psana` tests running on the DIALS xfel-regression testing
- [ ] **ND** or **DW**: Cannot view reciprocal lattice using dials.reciprocal_lattice_viewer [#2443](https://github.com/dials/dials/issues/2443)
- Probably needs someone to dig into windows gltbx behaviour, or at least work out where issue lies
- Reports from CCP4 workshop that people are having issue on latest ubuntu
- David reproduced the problem which is progress...
- ASB to point Billy to this; issue affects cctbx.multiplicity_viewer too
- **ND**: Investigate using stable-nightly conda builds of cctbx (e.g. cctbx tests) longer term

## Agenda

### dials.cosym finds the right operator but puts it wrongly
All done!

### Build fails on latest ventura
Good enuff for govt work - call it done

Works if you do `python bootstrap.py build --cmake` but not otherwise

Fine on Sonoma either way

### Reports of build failures on RHEL8
Done - problem evaporated

### Add support for Pilatus 4
Done

### https://github.com/cctbx/dxtbx/issues/675

- Same as pilatus issues happening to eiger with new DECTRIS
- Dimensions, fast, slow all inverted so all this needs to be sorted out
- Graeme waiting for example data to sort this out
- There is an open question from Takanori https://github.com/cctbx/dxtbx/issues/675#issuecomment-1884404008

### Removing setting batch offset when creating imagesets

- https://github.com/cctbx/dxtbx/pull/662
- We no longer need the batch offset => we can just remove it after changes by DGW
- Jan 2024 testing continues between Dan and James

## AOB?

### Windows support
- Done - this was a xia2 issue related to `real_space_grid_search` without the unit cell being set
- More generally, Windows support, probably goes first to CCP4 and then to DGW

### Adding xia2 to conda-forge
- This needs to happen
- Also, graphical fails on windows => **ND Action:** Fix these

### JBE Demos
- Demoing structural changes to indexing/retaining a crystal-less experiment object, to explicitly link the unindexed reflections for each imageset. JBE has implemented expeditor class to use at start of command-line programs to maintain compatibility of existing experiment list structures.
- Draft PR https://github.com/dials/dials/pull/2567
- Aaron suggest running xfel.merge to test
- Extended discussion about how far through the processing pipeline the crystal-less experiment object should be kept. If possible to output after integration, then all data reduction programs must be able to handle. Conclusion was that integrated data is fundamentally different to pre-integrated data, therefore have no need to have unindexed experiments in output of integration (this can always be added in future if use case arises).
- JBE to finish PR - updating all command line programs and updates following discussion (before Christmas). Then give people chance to test in new year.
- Also need to check xia2, and follow up with other users to assess any impacts - Neutron work? (David McDonagh), Laue work? (K Dalton, R Hewitt).
- GW suggested making a special release in order to test this changeset at DLS (in new year).
- Aaron would like dials.stills_process to have this feature for indexed output - GW suggested using ImageSequences is a prior requirement for clean implementation. So won't be included as part of this PR.

### DIALS West visit to East
- 10-11 Feb. Aaron and Dan available
- Agenda?
- Pub trip!
- Experiment starts Wed 12
- ASB around for 2 weeks, Dan for 1

### Next meeting

Thursday, January 25th, 4pm (GMT), 8am (PST)