diff --git a/common.pri b/common.pri
index 7dea220..6daf5cf 100644
--- a/common.pri
+++ b/common.pri
@@ -62,7 +62,7 @@ RCC_DIR        = $${ARCH_DIR}/$${BUILD_TYPE}/rcc
 
 LIMEREPORT_VERSION_MAJOR = 1
 LIMEREPORT_VERSION_MINOR = 4
-LIMEREPORT_VERSION_RELEASE = 43
+LIMEREPORT_VERSION_RELEASE = 47
 
 LIMEREPORT_VERSION = '\\"$${LIMEREPORT_VERSION_MAJOR}.$${LIMEREPORT_VERSION_MINOR}.$${LIMEREPORT_VERSION_RELEASE}\\"'
 DEFINES += LIMEREPORT_VERSION_STR=\"$${LIMEREPORT_VERSION}\"
diff --git a/limereport/lrdatadesignintf.cpp b/limereport/lrdatadesignintf.cpp
index 2bc5e3a..d33eda8 100644
--- a/limereport/lrdatadesignintf.cpp
+++ b/limereport/lrdatadesignintf.cpp
@@ -118,9 +118,9 @@ void QueryHolder::setConnectionName(QString connectionName)
     m_connectionName=connectionName;
 }
 
-void QueryHolder::invalidate(IDataSource::DatasourceMode mode){
+void QueryHolder::invalidate(IDataSource::DatasourceMode mode, bool dbWillBeClosed){
     QSqlDatabase db = QSqlDatabase::database(m_connectionName);
-    if (!db.isValid()){
+    if (!db.isValid() || dbWillBeClosed){
         setLastError(QObject::tr("Invalid connection! %1").arg(m_connectionName));
         delete m_query;
         m_dataSource.clear();
@@ -552,9 +552,10 @@ IDataSource *ProxyHolder::dataSource(IDataSource::DatasourceMode mode)
     return m_datasource.data();
 }
 
-void ProxyHolder::invalidate(IDataSource::DatasourceMode mode)
+void ProxyHolder::invalidate(IDataSource::DatasourceMode mode, bool dbWillBeClosed)
 {
     Q_UNUSED(mode)
+    Q_UNUSED(dbWillBeClosed);
     if (m_model && m_model->isInvalid()){
         m_invalid = true;
         m_lastError = tr("Datasource has been invalidated");
diff --git a/limereport/lrdatadesignintf.h b/limereport/lrdatadesignintf.h
index e51a3af..9910049 100644
--- a/limereport/lrdatadesignintf.h
+++ b/limereport/lrdatadesignintf.h
@@ -74,7 +74,7 @@ public:
     virtual bool isOwned() const = 0;
     virtual bool isEditable() const = 0;
     virtual bool isRemovable() const = 0;
-    virtual void invalidate(IDataSource::DatasourceMode mode) = 0;
+    virtual void invalidate(IDataSource::DatasourceMode mode, bool dbWillBeClosed = false) = 0;
     virtual void update() = 0;
     virtual void clearErrors() = 0;
     virtual ~IDataSourceHolder(){}
@@ -91,7 +91,7 @@ public:
     QString lastError() const { return m_dataSource->lastError(); }
     bool isEditable() const { return false; }
     bool isRemovable() const { return false; }
-    void invalidate(IDataSource::DatasourceMode mode){Q_UNUSED(mode)}
+    void invalidate(IDataSource::DatasourceMode mode, bool dbWillBeClosed = false){Q_UNUSED(mode) Q_UNUSED(dbWillBeClosed)}
     void update(){}
     void clearErrors(){}
 signals:
@@ -200,7 +200,7 @@ public:
     bool isPrepared() const {return m_prepared;}
     QString lastError() const { return m_lastError; }
     void setLastError(QString value){m_lastError=value; if (m_query) {delete m_query; m_query=0;}}
-    void invalidate(IDataSource::DatasourceMode mode);
+    void invalidate(IDataSource::DatasourceMode mode, bool dbWillBeClosed = false);
     void update();
     void clearErrors(){setLastError("");}
     DataSourceManager* dataManager() const {return m_dataManager;}
@@ -330,7 +330,7 @@ public:
     bool isEditable() const { return true; }
     bool isRemovable() const { return true; }
     QString lastError() const { return m_lastError; }
-    void invalidate(IDataSource::DatasourceMode mode);
+    void invalidate(IDataSource::DatasourceMode mode, bool dbWillBeClosed = false);
     void update(){}
     void clearErrors(){m_lastError = "";}
     DataSourceManager* dataManager() const {return m_dataManger;}
@@ -420,7 +420,7 @@ public:
     bool isOwned() const {return m_owned;}
     bool isEditable() const {return false;}
     bool isRemovable() const {return false;}
-    void invalidate(IDataSource::DatasourceMode mode){Q_UNUSED(mode)}
+    void invalidate(IDataSource::DatasourceMode mode, bool dbWillBeClosed = false){Q_UNUSED(mode) Q_UNUSED(dbWillBeClosed)}
     ~CallbackDatasourceHolder(){delete m_datasource;}
     void update(){}
     void clearErrors(){}
diff --git a/limereport/lrdatasourcemanager.cpp b/limereport/lrdatasourcemanager.cpp
index 365455e..4da9e63 100644
--- a/limereport/lrdatasourcemanager.cpp
+++ b/limereport/lrdatasourcemanager.cpp
@@ -930,7 +930,7 @@ void DataSourceManager::disconnectConnection(const QString& connectionName)
         if (isQuery(datasourceName) || isSubQuery(datasourceName)){
             QueryHolder* qh = dynamic_cast<QueryHolder*>(dataSourceHolder(datasourceName));
             if (qh && qh->connectionName().compare(connectionName,Qt::CaseInsensitive)==0){
-                qh->invalidate(designTime()?IDataSource::DESIGN_MODE:IDataSource::RENDER_MODE);
+                qh->invalidate(designTime()?IDataSource::DESIGN_MODE:IDataSource::RENDER_MODE, true);
                 qh->setLastError(tr("invalid connection"));
             }
         }
diff --git a/limereport/lrreportdesignwidget.cpp b/limereport/lrreportdesignwidget.cpp
index f88a971..a96854d 100644
--- a/limereport/lrreportdesignwidget.cpp
+++ b/limereport/lrreportdesignwidget.cpp
@@ -637,6 +637,9 @@ void ReportDesignWidget::slotPagePropertyObjectNameChanged(const QString &oldVal
 
 void ReportDesignWidget::slotTabMoved(int from, int to)
 {
+    Q_UNUSED(from)
+    Q_UNUSED(to)
+
     QList<PageDesignIntf*> pages;
 
     for ( int i = 0; i < m_tabWidget->tabBar()->count(); ++i){
diff --git a/limereport/lrreportengine.cpp b/limereport/lrreportengine.cpp
index 9e74c6f..dd1896c 100644
--- a/limereport/lrreportengine.cpp
+++ b/limereport/lrreportengine.cpp
@@ -364,7 +364,7 @@ bool ReportEnginePrivate::printToPDF(const QString &fileName)
 
 void ReportEnginePrivate::previewReport(PreviewHints hints)
 { 
-    QTime start = QTime::currentTime();
+//    QTime start = QTime::currentTime();
     try{
         dataManager()->setDesignTime(false);
         ReportPages pages = renderToPages();