diff --git a/core/include/Variable/VariableModel.h b/core/include/Variable/VariableModel.h
index 02b204b..7fa865a 100644
--- a/core/include/Variable/VariableModel.h
+++ b/core/include/Variable/VariableModel.h
@@ -25,12 +25,10 @@ public:
      * Creates a new variable in the model
      * @param name the name of the new variable
      * @param dateTime the dateTime of the new variable
-     * @param defaultDataSeries the default data of the new variable
      * @return the pointer to the new variable
      */
-    std::shared_ptr<Variable>
-    createVariable(const QString &name, const SqpDateTime &dateTime,
-                   std::shared_ptr<IDataSeries> defaultDataSeries) noexcept;
+    std::shared_ptr<Variable> createVariable(const QString &name,
+                                             const SqpDateTime &dateTime) noexcept;
 
     std::shared_ptr<Variable> variable(int index) const;
 
diff --git a/core/src/Variable/VariableCacheController.cpp b/core/src/Variable/VariableCacheController.cpp
index b5cbd3b..a648b4d 100644
--- a/core/src/Variable/VariableCacheController.cpp
+++ b/core/src/Variable/VariableCacheController.cpp
@@ -55,7 +55,7 @@ void VariableCacheController::addDateTime(std::shared_ptr<Variable> variable,
                                          impl->m_VariableToSqpDateTimeListMap.at(variable), 0);
             }
             catch (const std::out_of_range &e) {
-                qCWarning(LOG_VariableCacheController()) << e.what();
+                qCWarning(LOG_VariableCacheController()) << "addDateTime" << e.what();
             }
         }
     }
@@ -71,13 +71,12 @@ VariableCacheController::provideNotInCacheDateTimeList(std::shared_ptr<Variable>
     // list of date time request associated to the variable
     // We assume that the list is ordered in a way that l(0) < l(1). We assume also a < b
     // (with a & b of type SqpDateTime) means ts(b) > te(a)
-
-    try {
-        impl->addInCacheDataByStart(dateTime, impl->m_VariableToSqpDateTimeListMap.at(variable),
-                                    notInCache, 0, dateTime.m_TStart);
+    auto it = impl->m_VariableToSqpDateTimeListMap.find(variable);
+    if (it != impl->m_VariableToSqpDateTimeListMap.end()) {
+        impl->addInCacheDataByStart(dateTime, it->second, notInCache, 0, dateTime.m_TStart);
     }
-    catch (const std::out_of_range &e) {
-        qCWarning(LOG_VariableCacheController()) << e.what();
+    else {
+        notInCache << dateTime;
     }
 
     return notInCache;
diff --git a/core/src/Variable/VariableController.cpp b/core/src/Variable/VariableController.cpp
index 88a5567..0ac0a8b 100644
--- a/core/src/Variable/VariableController.cpp
+++ b/core/src/Variable/VariableController.cpp
@@ -99,8 +99,7 @@ void VariableController::createVariable(const QString &name,
     /// - default data are generated for the variable, without taking into account the timerange set
     /// in sciqlop
     auto dateTime = impl->m_TimeController->dateTime();
-    if (auto newVariable = impl->m_VariableModel->createVariable(
-            name, dateTime, generateDefaultDataSeries(*provider, dateTime))) {
+    if (auto newVariable = impl->m_VariableModel->createVariable(name, dateTime)) {
 
         // store the provider
         impl->m_VariableToProviderMap[newVariable] = provider;
@@ -114,10 +113,7 @@ void VariableController::createVariable(const QString &name,
               };
 
         connect(provider.get(), &IDataProvider::dataProvided, addDateTimeAcquired);
-
-
-        // store in cache
-        impl->m_VariableCacheController->addDateTime(newVariable, dateTime);
+        this->onRequestDataLoading(newVariable, dateTime);
 
         // notify the creation
         emit variableCreated(newVariable);
diff --git a/core/src/Variable/VariableModel.cpp b/core/src/Variable/VariableModel.cpp
index f03350b..9d6c6f1 100644
--- a/core/src/Variable/VariableModel.cpp
+++ b/core/src/Variable/VariableModel.cpp
@@ -52,9 +52,8 @@ VariableModel::VariableModel(QObject *parent)
 {
 }
 
-std::shared_ptr<Variable>
-VariableModel::createVariable(const QString &name, const SqpDateTime &dateTime,
-                              std::shared_ptr<IDataSeries> defaultDataSeries) noexcept
+std::shared_ptr<Variable> VariableModel::createVariable(const QString &name,
+                                                        const SqpDateTime &dateTime) noexcept
 {
     auto insertIndex = rowCount();
     beginInsertRows({}, insertIndex, insertIndex);
@@ -62,7 +61,6 @@ VariableModel::createVariable(const QString &name, const SqpDateTime &dateTime,
     /// @todo For the moment, the other data of the variable is initialized with default values
     auto variable = std::make_shared<Variable>(name, QStringLiteral("unit"),
                                                QStringLiteral("mission"), dateTime);
-    variable->setDataSeries(std::move(defaultDataSeries));
 
     impl->m_Variables.push_back(variable);