diff --git a/include/lrglobal.h b/include/lrglobal.h
index 3c9af32..1c501d5 100644
--- a/include/lrglobal.h
+++ b/include/lrglobal.h
@@ -76,6 +76,7 @@ namespace Const{
     const qreal SELECTION_OPACITY = 0.3;
     const QString FIELD_RX = "\\$D\\s*\\{\\s*([^{}]*)\\s*\\}";
     const QString VARIABLE_RX = "\\$V\\s*\\{\\s*([^{}]*)\\s*\\}";
+    const QString NAMED_VARIABLE_RX = "\\$V\\s*\\{\\s*(%1)\\s*\\}";
     const QString SCRIPT_RX = "\\$S\\s*\\{(.*)\\}";
 
     //const QString GROUP_FUNCTION_PARAM_RX = "\\(\\s*(((?:\\\"?\\$D\\s*\\{\\s*)|(?:\\\"?\\$V\\s*\\{\\s*)|(?:\\\"))(\\w+\\.?\\w+)((?:\\\")|(?:\\s*\\}\\\"?\\s*)))\\s*,\\s*\\\"(\\w+)\\\"\\s*\\)";
diff --git a/limereport/lrdatasourcemanager.cpp b/limereport/lrdatasourcemanager.cpp
index 6ff7d9e..365455e 100644
--- a/limereport/lrdatasourcemanager.cpp
+++ b/limereport/lrdatasourcemanager.cpp
@@ -228,6 +228,16 @@ DataSourceManager::DataSourceManager(QObject *parent) :
     setSystemVariable(QLatin1String("#PAGE_COUNT"),0,SecondPass);
     setSystemVariable(QLatin1String("#IS_LAST_PAGEFOOTER"),false,FirstPass);
     setSystemVariable(QLatin1String("#IS_FIRST_PAGEFOOTER"),false,FirstPass);
+
+    connect(&m_reportVariables, SIGNAL(variableHasBeenAdded(QString)),
+            this, SLOT(slotVariableHasBeenAdded(QString)) );
+    connect(&m_reportVariables, SIGNAL(variableHasBeenChanged(QString)),
+            this, SLOT(slotVariableHasBeenChanged(QString)));
+    connect(&m_userVariables, SIGNAL(variableHasBeenAdded(QString)),
+            this, SLOT(slotVariableHasBeenAdded(QString)) );
+    connect(&m_userVariables, SIGNAL(variableHasBeenChanged(QString)),
+            this, SLOT(slotVariableHasBeenChanged(QString)));
+
     m_datasourcesModel.setDataSourceManager(this);
 }
 
@@ -1235,6 +1245,32 @@ void DataSourceManager::slotQueryTextChanged(const QString &queryName, const QSt
     }
 }
 
+void DataSourceManager::invalidateQueriesContainsVariable(const QString& variableName)
+{
+    if (!variableIsSystem(variableName)){
+        foreach (const QString& datasourceName, dataSourceNames()){
+            QueryHolder* holder = dynamic_cast<QueryHolder*>(m_datasources.value(datasourceName));
+            if (holder){
+                QRegExp rx(QString(Const::NAMED_VARIABLE_RX).arg(variableName));
+                if  (holder->queryText().contains(rx))
+                    holder->invalidate(designTime()?IDataSource::DESIGN_MODE:IDataSource::RENDER_MODE);
+            }
+        }
+    }
+}
+
+void DataSourceManager::slotVariableHasBeenAdded(const QString& variableName)
+{
+    //qDebug()<< "variable has been added"<< variableName;
+    invalidateQueriesContainsVariable(variableName);
+}
+
+void DataSourceManager::slotVariableHasBeenChanged(const QString& variableName)
+{
+    //qDebug()<< "variable has been changed"<< variableName;
+    invalidateQueriesContainsVariable(variableName);
+}
+
 void DataSourceManager::clear(ClearMethod method)
 {
     DataSourcesMap::iterator dit;
diff --git a/limereport/lrdatasourcemanager.h b/limereport/lrdatasourcemanager.h
index ea77064..fabb694 100644
--- a/limereport/lrdatasourcemanager.h
+++ b/limereport/lrdatasourcemanager.h
@@ -224,9 +224,12 @@ protected:
     void setLastError(const QString& value);
     void invalidateLinkedDatasources(QString datasourceName);
     bool checkConnection(QSqlDatabase db);
+    void invalidateQueriesContainsVariable(const QString& variableName);
 private slots:
     void slotConnectionRenamed(const QString& oldName,const QString& newName);
     void slotQueryTextChanged(const QString& queryName, const QString& queryText);
+    void slotVariableHasBeenAdded(const QString& variableName);
+    void slotVariableHasBeenChanged(const QString& variableName);
 private:
     explicit DataSourceManager(QObject *parent = 0);
     bool initAndOpenDB(QSqlDatabase &db, ConnectionDesc &connectionDesc);
diff --git a/limereport/lrglobal.h b/limereport/lrglobal.h
index 3c9af32..1c501d5 100644
--- a/limereport/lrglobal.h
+++ b/limereport/lrglobal.h
@@ -76,6 +76,7 @@ namespace Const{
     const qreal SELECTION_OPACITY = 0.3;
     const QString FIELD_RX = "\\$D\\s*\\{\\s*([^{}]*)\\s*\\}";
     const QString VARIABLE_RX = "\\$V\\s*\\{\\s*([^{}]*)\\s*\\}";
+    const QString NAMED_VARIABLE_RX = "\\$V\\s*\\{\\s*(%1)\\s*\\}";
     const QString SCRIPT_RX = "\\$S\\s*\\{(.*)\\}";
 
     //const QString GROUP_FUNCTION_PARAM_RX = "\\(\\s*(((?:\\\"?\\$D\\s*\\{\\s*)|(?:\\\"?\\$V\\s*\\{\\s*)|(?:\\\"))(\\w+\\.?\\w+)((?:\\\")|(?:\\s*\\}\\\"?\\s*)))\\s*,\\s*\\\"(\\w+)\\\"\\s*\\)";
diff --git a/limereport/lrscriptenginemanager.cpp b/limereport/lrscriptenginemanager.cpp
index 866c4c5..3845a54 100644
--- a/limereport/lrscriptenginemanager.cpp
+++ b/limereport/lrscriptenginemanager.cpp
@@ -216,7 +216,11 @@ QScriptValue setVariable(QScriptContext* pcontext, QScriptEngine* /*pengine*/){
     ScriptEngineManager* sm = qscriptvalue_cast<ScriptEngineManager*>(pcontext->callee().data());
     DataSourceManager* dm = sm->dataManager();
 
-    dm->changeVariable(name,value);
+    if (dm->containsVariable(name))
+        dm->changeVariable(name,value);
+    else
+        dm->addVariable(name, value);
+
     return QScriptValue();
 }
 
diff --git a/limereport/lrvariablesholder.cpp b/limereport/lrvariablesholder.cpp
index dd46b4e..9cdf630 100644
--- a/limereport/lrvariablesholder.cpp
+++ b/limereport/lrvariablesholder.cpp
@@ -61,6 +61,7 @@ void VariablesHolder::addVariable(const QString& name, const QVariant& value, Va
         m_varNames.insert(name,varValue);
         if (type==VarDesc::Report)
             m_userVariables.append(varValue);
+        emit variableHasBeenAdded(name);
     } else {
         throw ReportError(tr("variable with name ")+name+tr(" already exists!"));
     }
@@ -86,6 +87,7 @@ void VariablesHolder::deleteVariable(const QString &name)
         m_userVariables.removeOne(m_varNames.value(name));
         delete m_varNames.value(name);
         m_varNames.remove(name);
+        emit variableHasBennDeleted(name);
     }
 }
 
@@ -93,6 +95,7 @@ void VariablesHolder::changeVariable(const QString &name, const QVariant &value)
 {
     if(m_varNames.contains(name)) {
         m_varNames.value(name)->setValue(value);
+        emit variableHasBeenChanged(name);
     } else
         throw ReportError(tr("variable with name ")+name+tr(" does not exists!"));
 }
diff --git a/limereport/lrvariablesholder.h b/limereport/lrvariablesholder.h
index ede1ac6..e375ea8 100644
--- a/limereport/lrvariablesholder.h
+++ b/limereport/lrvariablesholder.h
@@ -92,6 +92,9 @@ public:
     int userVariablesCount();
     VarDesc* userVariableAt(int index);
 signals:
+    void variableHasBeenAdded(const QString& variableName);
+    void variableHasBeenChanged(const QString& variableName);
+    void variableHasBennDeleted(const QString& variableName);
 private:
     QMap<QString,VarDesc*> m_varNames;
     QList<VarDesc*> m_userVariables;