Version 6.2.0 was released on Jul 30, 2026!

This is a feature release, which comes with a number of new features, improvements, and bug fixes as listed below.

This version of SasView is built with Python 3.13, Sasmodels v1.1.0, Sasdata v0.12.2, and Bumps v1.0.5.

New Features

  • Multiple slicers are now supported, including plot stacking and symmetric slicers.
  • The Invariant perspective has been given a major facelift, with a more user-friendly navigation. It now supports the calculation of SLD contrast from volume fraction (reverse calculation) and uncertainties on input parameters.
  • A new button is now available for any 1D plot to be sent to the Data Explorer for further analysis.
  • Support for SAXS fitting v2 has been added.

Improvements

  • Improvements in Corfunc slider, UI and documentation.
  • Add Shape2SAS plugin models (not available to users).
  • Set wedge slicer fold default to True.
  • Show correlation stats as a table.
  • Make data operation window resizable and update docs.
  • Implement Close Project functionality.
  • Make Return act as Tab in parameter tables.
  • Refactor and improve the fitting widget.
  • Change Guinier extrapolation to radius squared.
  • Implement horizontal resize.
  • Add Help context menu item.
  • Remove hardcoded background colours and standardise UI.
  • Restore fold for sector slicers.
  • Add corrected intensities to Corfunc output.
  • Improve fitting reports.
  • Normalise wedge slicer phi to (-180,180].
  • Close slicer parameter window with 2D plot.
  • Redraw Box Sum after parameters are updated.
  • Add tooltips to perspective UIs.
  • Add documentation for CustomToolbar.

Infrastructure

  • Dependabot: include all action updates in one PR.
  • Reduce duplicate CI builds and improve workflows.
  • Upgrade Python to 3.12.
  • Set Python 3.13 for the next release.
  • Rework CI variables.
  • Update installation documentation.
  • Add Credits/Licences dialog with relevant licence and copyright data.
  • Improve PR job handling.
  • Remove requirement pins from release branches.
  • Update install instructions, README, and add resources.
  • Add UI file for What’s New window.
  • Enable building custom branches.
  • Centralise release Python version definition.
  • Add CLI argument for data path.
  • Add Python 3.14 as a supported interpreter.
  • Improve release tooling.
  • Fix installer test job name display.
  • Fix duplicated CI job runs on pull requests.
  • Release automation script rework and remove authors.
  • Remove DISPLAY: 99 value from CI.
  • Add builds to CI for pushes to main.
  • Use the new official DigiCert action.
  • Fix invocation of compile_licenses.py.
  • Remove .coverage file.
  • Add MPL hooks.
  • Temporarily pin and then unpin the pyausaxs version.
  • MacOS drag and drop installer.

Code Quality

  • Make ruff more verbose about what it does not like.
  • Generalize Corfunc slider.
  • Implement SliderPerspective properly.
  • Clean up and reformat Invariant perspective.
  • Use GuiUtil.communicator wherever possible.
  • Reactivate GUI tests from the CI.
  • Clean up inversion code.
  • Improve and add tests for Invariant Perspective UI and calculator.
  • Fix GSC GUI unit test.
  • Add offscreen mode to top-level conftest.py.
  • Remove print statements from sascalc tests.
  • Clean up Size Distribution perspective UI files.
  • Adds code to replace plot data for modified slicers.
  • Refactors slicers to remove unnecessary “updatePlot” calls.
  • Makes colormaptest robust against matplotlib changes.

Bug Fixes

  • Fix nightly build issues.
  • Remove relative import in main.py.
  • Fix startup bug.
  • Fix stray references to run.py.
  • Fix C++ conversion error in plotting.
  • Fix typo in the documentation for adding files via upload.
  • Exclude C&S fitting tabs from tab_id calculation.
  • Fix dispersity parameter naming for the multishell model.
  • Fix name selection issue in the Data Operations Panel.
  • Fix replace fit button handling after project load.
  • Fix keypair alias after certificate update.
  • Restrict custom plot button to the Data Explorer.
  • Remove uv lock file.
  • Fix handling of None in kernel_module.
  • Fix truthiness logic check.
  • Fix 2D polydispersity bug.
  • Fix model reordering in constrained fitting.
  • Fix invariant graphs.
  • Fix optimizer loading after project load.
  • Fix unique ID generation for multiple slicers.
  • Fix scaling bug in 1D plots.
  • Fix Dmax explorer plot turning into a scatter plot when resetting view.
  • Fix error propagation in power law.
  • Fix structure factor copy/paste handling.
  • Don’t include magnetism parameters in pure Python models.
  • Release 6.2.0 polyhedron html.
  • Change docpath handling to accept absolute-looking paths within the distribution.
  • Fix private names config for sphinx (for 6.2.0).
  • Resized images and changed to a light background for What’s New.
  • What’s New polyhedron image switched to light background.
  • PD function shadowing.
  • Handles encoding issues in loading credits.html.
  • Adds example data from SasData repository.
  • Fixes mask editor bug.
  • Fixes symmetric wedge phi plots.
  • Checks slicer children for removal.
  • Fixes bugs for cloned slicer plots.
  • Update Licence with number of institutions.
  • SAXS fitting What’s New.
  • Amend docs for invariant slider and image.
  • Fix call to setSlicer post API change.

For more details, please see the Release Notes which are now available from the program Help or online.

New Models

Three new models ahve been added to SasView since v6.1.3 was release:

  • Truncated octahedron
  • Nanoprisms
  • Truncated tetrahedron

The following models have been added to the Model Marketplace since v6.1.3 was released: