diff --git a/src/libs/antares/study/area/list.cpp b/src/libs/antares/study/area/list.cpp
index 868c3d5490..153ff7c19b 100644
--- a/src/libs/antares/study/area/list.cpp
+++ b/src/libs/antares/study/area/list.cpp
@@ -1201,7 +1201,7 @@ bool AreaList::loadFromFolder(const StudyLoadOptions& options)
                       ret;
 
                 const auto constraints_folder = stsFolder / "constraints" / area->id.c_str();
-                ret = area->shortTermStorage.LoadConstraintsFromIniFile(cluster_folder) && ret;
+                ret = area->shortTermStorage.LoadConstraintsFromIniFile(constraints_folder) && ret;
             }
         }
         else
diff --git a/src/libs/antares/study/parts/short-term-storage/container.cpp b/src/libs/antares/study/parts/short-term-storage/container.cpp
index 1e46be0a5f..25077864b5 100644
--- a/src/libs/antares/study/parts/short-term-storage/container.cpp
+++ b/src/libs/antares/study/parts/short-term-storage/container.cpp
@@ -149,13 +149,13 @@ bool STStorageInput::LoadConstraintsFromIniFile(const fs::path& parent_path)
                     ++localIndex;
                 }
             }
-
-            // try to read the rhs
-            loadFile(parent_path / ("rhs_" + additional_constraints.name + ".txt"),
-                     additional_constraints.rhs);
-            fillIfEmpty(additional_constraints.rhs, 0.0);
         }
 
+        // try to read the rhs
+        loadFile(parent_path / ("rhs_" + additional_constraints.name + ".txt"),
+                 additional_constraints.rhs);
+        fillIfEmpty(additional_constraints.rhs, 0.0);
+
         if (auto [ok, error_msg] = additional_constraints.validate(); !ok)
         {
             logs.error() << "Invalid constraint in section: " << section->name;
@@ -229,8 +229,19 @@ std::size_t STStorageInput::cumulativeConstraintCount() const
     return std::accumulate(storagesByIndex.begin(),
                            storagesByIndex.end(),
                            0,
-                           [](int acc, const auto& cluster)
-                           { return acc + cluster.additional_constraints.size(); });
+                           [](size_t outer_constraint_count, const auto& cluster)
+                           {
+                               return outer_constraint_count + std::accumulate(
+                                              cluster.additional_constraints.begin(),
+                                              cluster.additional_constraints.end(),
+                                              0,
+                                              [](size_t inner_constraint_count,
+                                                 const auto& additional_constraints)
+                                              {
+                                                  return inner_constraint_count +
+                                                         additional_constraints.constraints.size();
+                                              });
+                           });
 }
 
 std::size_t STStorageInput::count() const