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<code>mtkcompile</code> does not turn inputs to parameters

bugSomething isn't workingSomething isn't working

Status: Open.

#4352 In SciML/ModelingToolkit.jl;

· hexaeder opened on Feb 24, 2026

Repeated optimization (differentiation?) of a System keeps incurring type inference / compilation time

Status: Open.

#4351 In SciML/ModelingToolkit.jl;

· cstjean opened on Feb 24, 2026

<code>get_variables</code> does not "descend" into <code>Differential</code> anymore

bugSomething isn't workingSomething isn't working

Status: Open.

#4347 In SciML/ModelingToolkit.jl;

· hexaeder opened on Feb 23, 2026

<code>SII.all_symbols</code> errors on non-complete system in MTK@11

bugSomething isn't workingSomething isn't working

Status: Open.

#4346 In SciML/ModelingToolkit.jl;

· hexaeder opened on Feb 23, 2026

UndefVarError in generated code for LinearProblem

bugSomething isn't workingSomething isn't working

multibody

Status: Open.

#4345 In SciML/ModelingToolkit.jl;

· baggepinnen opened on Feb 23, 2026

TypeError in varmap_to_vars

bugSomething isn't workingSomething isn't working

multibody

Status: Open.

#4343 In SciML/ModelingToolkit.jl;

· baggepinnen opened on Feb 23, 2026

AD through initialization does not work

bugSomething isn't workingSomething isn't working

Status: Open.

#4342 In SciML/ModelingToolkit.jl;

· hersle opened on Feb 23, 2026

Unnecessary heap allocations in ODE function

bugSomething isn't workingSomething isn't working

Status: Open.

#4336 In SciML/ModelingToolkit.jl;

· 1-Bart-1 opened on Feb 21, 2026

Failed to scalarize equation on Julia 1.10, 1.12 works

bugSomething isn't workingSomething isn't working

Status: Open.

#4334 In SciML/ModelingToolkit.jl;

· 1-Bart-1 opened on Feb 21, 2026

Overlong type names lead to crashes

Status: Open.

#4332 In SciML/ModelingToolkit.jl;

· kaandocal opened on Feb 20, 2026

<code>System(; tstops)</code> is very inefficient

bugSomething isn't workingSomething isn't working

Status: Open.

#4330 In SciML/ModelingToolkit.jl;

· cstjean opened on Feb 20, 2026

Trivial nonlinear system not simplifying to zero

Status: Open.

#4322 In SciML/ModelingToolkit.jl;

· ChrisRackauckas opened on Feb 18, 2026