SciML/ModelingToolkit.jl ModelingToolkitBase-v1.77.1 on GitHub

ModelingToolkitBase ModelingToolkitBase-v1.77.1

Fix saved_clock_partitions length for array-valued continuous events.: #5222
Keep the sparse ODE Jacobian within the pattern of its prototype: #5198
Reconstruct whole arrays in the SCC CacheWriter when prior states are views: #5184
Fix initialization for residual array-slice equations: #5191
Handle SCCNonlinearProblem with no remaining unknowns: #5183
SciML/fix-write-possibly-indexed-array-broadcast: #5186
SciML/fix/single-element-root-template: #5209
SciML/as/fix-array-codegen: #5157
Return a vector from a root CopyParamsByTemplate with a single entry
Skip nameless entries in propertynames and getvar of AbstractSystem: #5204
fix: keep connector types in NonlinearSystem and transfer only valid Initial values in steady-state SCC lowering: #5208
fix: use symbolic-valued dict for IRSubstituter rules
fix: update expand_array_derivatives usage, improve performance
Broadcast scalars to array keys in write_possibly_indexed_array!

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Merged pull requests:

refactor: improve new array-form codegen (#5157) (@AayushSabharwal)
Fix dead PDEBase link in PDESystem docs (#5167) (@ChrisRackauckas-Claude)
Handle SCCNonlinearProblem with no remaining unknowns (#5183) (@ChrisRackauckas-Claude)
Reconstruct whole arrays in the SCC CacheWriter when prior states are views (#5184) (@ChrisRackauckas-Claude)
Broadcast scalars to array keys in write_possibly_indexed_array! (#5186) (@AayushSabharwal)
Fix initialization for residual array-slice equations (#5191) (@ChrisRackauckas-Claude)
Fall back to the unlowered residual when the steady-state SCC lowering is structurally singular (#5197) (@SebastianM-C)
Keep the sparse ODE Jacobian within the pattern of its prototype (#5198) (@SebastianM-C)
Skip nameless entries in propertynames/getvar of AbstractSystem (#5204) (@ChrisRackauckas-Claude)
Fix steady-state SCC lowering for hierarchical models with connectors and for array unknowns (#5208) (@avinashresearch1)
Return a vector from a root CopyParamsByTemplate with a single entry (#5209) (@baggepinnen)
Fix saved_clock_partitions for array-valued continuous events (#5220) (#5222) (@ChrisRackauckas-Claude)
Bump ModelingToolkitBase to 1.77.1 and ModelingToolkit to 11.45.2 (#5228) (@ChrisRackauckas)

Closed issues:

REPL tab completion of system with Differential state throws exception (#923)
write_possibly_indexed_array! should broadcast scalar values to array-shaped keys (remove write_dd_guess!) (#5147)
SteadyStateProblem SCC lowering throws ExtraEquationsSystemException inside solve (also for DynamicSS) on structurally singular residuals (#5177)
SCCNonlinearProblem with no remaining unknowns fails in ForwardDiff (chunk size 1 > structural length 0) (#5179)
SCC CacheWriter leaves whole arrays unbound when prior state symbols are views (#5180)
Array-valued continuous-event conditions that modify a discrete array hit a BoundsError in save_discretes! at the third root (#5220)