2.5 Release Candidate #1

2.5 Release Candidate #1

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IDAES-PSE 2.5.0rc1 Release Highlights

Upcoming Changes

• IDAES will be switching to the new Pyomo solver interface in the next release. Whilst this will hopefully be a smooth transition for most users, there are a few important changes to be aware of.
  • The new solver interface uses a different version of the IPOPT writer (“ipopt_v2”) and thus any custom configuration options you might have set for IPOPT will not carry over and will need to be reset.
  • By default, the new Pyomo linear presolver will be activated with ipopt_v2. Whilst are working to identify any bugs in the presolver, it is possible that some edge cases will remain.
• IDAES will begin deploying a new set of scaling tools and APIs over the next few releases that make use of the new solver writers.
• The old scaling tools and APIs will remain for backward compatibility but will begin to be deprecated.

New Models, Tools and Features

• New diagnostics check for near-parallel variables and constraints.
• New diagnostics tools for identifying causes of infeasibility in models.
• New example for creating a custom model of a liquid-liquid extractor unit operation.

Bug Fixes

• Fixed bug in Gibbs reactor that caused it to appear to have additional spurious degrees of freedom.
• Fixed bug in the Modular Property Framework that would cause errors when trying to use phase-based material balances with phase equilibria.
• Fixed bug in Modular Properties Framework that caused errors when initializing models with non-vapor-liquid phase equilibria.

Testing and Robustness

• Deployed the IDAES Diagnostics Toolbox to confirm that there are no structural or numerical issues in the core model libraries.
• Additional robustness tests for core model, and some associated improvements in the converge tester class.
• Fixed a number of issues that were causing unexpected warnings to be emitted during testing.

Deprecations and Removals

Removed examples for RIPE tool which has not been supported for a number of releases.

What's Changed

• Add constraint to exclude TensorFlow 2.16.1 and above by @lbianchi-lbl in #1373
• Update imports of native_types and pyomo_constant_types in scaling module by @Robbybp in #1366
• Restore ability to run pytest on individual files or directories by @lbianchi-lbl in #1362
• Tweaks to convergence tester by @andrewlee94 in #1377
• Add diagnostics tests for all unit models by @andrewlee94 in #1375
• Resolve CI failures from new version (1.20.4) of spellchecker by @lbianchi-lbl in #1389
• Fix target for 'fv' (flowsheet visualizer) reference by @dangunter in #1391
• Updating black and rerunning it on all files by @ksbeattie in #1388
• Fixing spurious DoF in Gibbs reactor model by @andrewlee94 in #1393
• Update parameter sweep tool to support indexed vars by @andrewlee94 in #1387
• Adding attributes to hold units used by MSContactor by @andrewlee94 in #1396
• Crossflow hx by @dallan-keylogic in #1382
• bug fix for issue #1364: catch AttributeError in set_scaling_from_default by @jasonmbray-p66 in #1400
• Add parallel constraint/variable check to report_numerical_issues by @Robbybp in #1385
• Address many unexpected warnings in pytest by @andrewlee94 in #1403
• Renaming components by @andrewlee94 in #1402
• Update the Pyomo tag to the 6.7.2 release by @blnicho in #1406
• Infeasibility diagnostic tool by @bknueven in #1409
• Allow upwinding in 1D Heat exchanger by @dallan-keylogic in #1383
• Adding USD_2022 to units library as the most recently published value by @hunterbarber in #1413
• Option to skip parallel component checks by @andrewlee94 in #1417
• Update pyomo requirement to 6.7.3 by @lbianchi-lbl in #1420

New Contributors

• @jasonmbray-p66 made their first contribution in #1400

Full Changelog: 2.4.0...2.5.0rc1