(MAYBE) fix: handle scalarized parameters in initialization equations

Author: AayushSabharwal

src/systems/nonlinear/initializesystem.jl

@@ -110,6 +110,20 @@ function generate_initializesystem(sys::ODESystem;
                 error("Invalid setup: parameter $(p) has no default value or initial guess")
             end
             push!(u0, varp => guesses[p])
+        elseif Symbolics.isarraysymbolic(p) && Symbolics.shape(p) != Symbolics.Unknown()
+            for _p in collect(p)
+                if (_val1 = get(pmap, _p, nothing)) === missing || get(defs, _p, nothing) === missing
+                    varp = tovar(_p)
+                    paramsubs[_p] = varp
+                    if _val1 !== nothing && _val1 !== missing
+                        push!(eqs_ics, varp ~ _val1)
+                    end
+                    if !haskey(guesses, _p)
+                        error("Invalid setup: parameter $(_p) has no default value or initial guess")
+                    end
+                    push!(u0, varp => guesses[_p])
+                end
+            end
         end
     end
     pars = vcat(