Fix ImperativeAffect namespacing for arrays in non-root components

src/systems/imperative_affect.jl

@@ -101,10 +101,22 @@ end
 
 namespace_affects(af::ImperativeAffect, s) = namespace_affect(af, s)
 function namespace_affect(affect::ImperativeAffect, s)
+    rmn = []
+    for modded in modified(affect)
+        if symbolic_type(modded) == NotSymbolic() && modded isa AbstractArray
+            res = []
+            for m in modded
+                push!(res, renamespace(s, m))
+            end
+            push!(rmn, res)
+        else
+            push!(rmn, renamespace(s, modded))
+        end
+    end
     ImperativeAffect(func(affect),
         namespace_expr.(observed(affect), (s,)),
         observed_syms(affect),
-        renamespace.((s,), modified(affect)),
+        rmn,
         modified_syms(affect),
         context(affect),
         affect.skip_checks)

test/symbolic_events.jl

@@ -1434,3 +1434,30 @@ end
     sol2 = solve(ODEProblem(sys2, [], (0.0, 1.0)), Tsit5())
     @test 100.0 ∈ sol2[sys2.wd2.θ]
 end
+
+@testset "Array parameter updates of parent components in ImperativeEffect" begin
+    function child(vals; name, max_time = 0.1)
+        vars = @variables begin
+            x(t) = 0.0
+        end
+        eqs = reduce(vcat, Symbolics.scalarize.([
+            D(x) ~ 1.0
+        ]))
+        reset = ModelingToolkit.ImperativeAffect(
+            modified = (; vals = Symbolics.scalarize(ParentScope.(vals)), x)) do m, o, _, i
+            @set! m.vals = m.vals .+ 1
+            @set! m.x = 0.0
+            return m
+        end
+        return ODESystem(eqs, t, vars, []; name = name,
+            continuous_events = [[x ~ max_time] => reset])
+    end
+    shared_pars = @parameters begin
+        vals(t)[1:2] = 0.0
+    end
+
+    @named sys = ODESystem(Equation[], t, [], Symbolics.scalarize(vals);
+        systems = [child(vals; name = :child)])
+    sys = structural_simplify(sys)
+    sol = solve(ODEProblem(sys, [], (0.0, 1.0)), Tsit5())
+end