diff --git a/include/evalhyd/detail/probabilist/intervals.hpp b/include/evalhyd/detail/probabilist/intervals.hpp
index 19577cf9e7398db8674a1f5b0b9020cc6b29f21d..1033e5c25c289f171b1bc99e01bb51b415e808f1 100644
--- a/include/evalhyd/detail/probabilist/intervals.hpp
+++ b/include/evalhyd/detail/probabilist/intervals.hpp
@@ -69,19 +69,20 @@ namespace evalhyd
                     auto a = xt::broadcast(xt::view(quantiles, i), std::vector<std::size_t>({q_lvl.size(), 2}));
                     auto b = xt::broadcast(q_lvl, std::vector<std::size_t>({2, q_lvl.size()}));
                     auto res = xt::where(xt::equal(a, xt::transpose(b)));
-                    //if (res.size() != 2) 
-                    //{
-                    //    throw std::runtime_error(
-                    //            "interval-based metric requested, "
-                    //            "but *c_lvl* not matching *q_lvl"
-                    //    );
-                    //} else 
-                    //{
+                    std::cout << "res: " << res << std::endl;
+                    if (res.size() != 2) 
+                    {
+                        throw std::runtime_error(
+                                "interval-based metric requested, "
+                                "but *c_lvl* not matching *q_lvl"
+                        );
+                    } else 
+                    {
                         xt::view(itv_bnds, xt::all(), xt::all(), i, 0, xt::all()) =
                                 xt::view(q_prd, xt::all(), xt::all(), 0, xt::all());
                         xt::view(itv_bnds, xt::all(), xt::all(), i, 1, xt::all()) = 
                                 xt::view(q_prd, xt::all(), xt::all(), 1, xt::all());
-                    //}
+                    }
                     }
                 }
                 else