fix

Author: TorkelE

src/dsl.jl

@@ -793,7 +793,7 @@ function read_observed_options(options, species_n_vars_declared, ivs_sorted)
                 # then we get something like :([:X1, :X2]), rather than :([X1, X2]).
                 dep_var_expr = :(filter(!MT.isparameter, Symbolics.get_variables($(obs_eq.args[3]))))
                 ivs_get_expr = :(unique(reduce(vcat,[arguments(MT.unwrap(dep)) for dep in $dep_var_expr])))
-                sort_func(iv) = findfirst(MT.getname(iv) == ivs for ivs in $ivs_sorted)
+                sort_func(iv) = findfirst(MT.getname(iv) == ivs for ivs in ivs_sorted)
                 ivs_get_expr_sorted = :(sort($(ivs_get_expr); by = sort_func))
                 push!(observed_expr.args, :($obs_name = $(obs_name)($(ivs_get_expr_sorted)...)))
             end