needs to be prob.f

jClugstor · jClugstor · commit d5ec8556e61e · 2025-04-02T11:14:57.000-04:00
diff --git a/lib/OrdinaryDiffEqDifferentiation/src/alg_utils.jl b/lib/OrdinaryDiffEqDifferentiation/src/alg_utils.jl
@@ -122,7 +122,7 @@ function prepare_user_sparsity(ad_alg, prob)
 
                 if !isnothing(jac_prototype)
                     for idx in idxs
-                        jac_prototype[idx] = f.mass_matrix[idx]
+                        jac_prototype[idx] = prob.f.mass_matrix[idx]
                     end
                 end
             end
