diff --git a/src/plugins/qmldesigner/designercore/instances/nodeinstanceclientproxy.cpp b/src/plugins/qmldesigner/designercore/instances/nodeinstanceclientproxy.cpp
index 62bdb948c3c9889b50de7de345c816119aaffc00..606218b520baf3db2ac8bebb12b761e99b627c1e 100644
--- a/src/plugins/qmldesigner/designercore/instances/nodeinstanceclientproxy.cpp
+++ b/src/plugins/qmldesigner/designercore/instances/nodeinstanceclientproxy.cpp
@@ -74,6 +74,8 @@ NodeInstanceClientProxy::NodeInstanceClientProxy(QObject *parent)
     : QObject(parent),
       m_nodeInstanceServer(0),
       m_blockSize(0),
+      m_writeCommandCounter(0),
+      m_lastReadCommandCounter(0),
       m_synchronizeId(-1)
 {
     if (QCoreApplication::arguments().at(2) == QLatin1String("previewmode")) {
@@ -94,9 +96,12 @@ NodeInstanceClientProxy::NodeInstanceClientProxy(QObject *parent)
 
 void NodeInstanceClientProxy::writeCommand(const QVariant &command)
 {
+    static unsigned int commandCounter = 0;
     QByteArray block;
     QDataStream out(&block, QIODevice::WriteOnly);
     out << quint32(0);
+    out << quint32(m_writeCommandCounter);
+    m_writeCommandCounter++;
     out << command;
     out.device()->seek(0);
     out << quint32(block.size() - sizeof(quint32));
@@ -168,6 +173,13 @@ void NodeInstanceClientProxy::readDataStream()
         if (m_socket->bytesAvailable() < m_blockSize)
             break;
 
+        quint32 commandCounter;
+        in >> commandCounter;
+        bool commandLost = !((m_lastReadCommandCounter == 0 && commandCounter == 0) || (m_lastReadCommandCounter + 1 == commandCounter));
+        if (commandLost)
+            qDebug() << "client command lost: " << m_lastReadCommandCounter <<  commandCounter;
+        m_lastReadCommandCounter = commandCounter;
+
         QVariant command;
         in >> command;
         m_blockSize = 0;
diff --git a/src/plugins/qmldesigner/designercore/instances/nodeinstanceclientproxy.h b/src/plugins/qmldesigner/designercore/instances/nodeinstanceclientproxy.h
index a1630908537587cc180c8a7be6510c8c4e5c38b8..113cfb4f24a2fa9e9df128643f6edb336dcd2330 100644
--- a/src/plugins/qmldesigner/designercore/instances/nodeinstanceclientproxy.h
+++ b/src/plugins/qmldesigner/designercore/instances/nodeinstanceclientproxy.h
@@ -104,6 +104,8 @@ private:
     QLocalSocket *m_socket;
     NodeInstanceServerInterface *m_nodeInstanceServer;
     quint32 m_blockSize;
+    quint32 m_writeCommandCounter;
+    quint32 m_lastReadCommandCounter;
     int m_synchronizeId;
 };
 
diff --git a/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.cpp b/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.cpp
index 8fbb33e8ebbf304c76b3063bf6fed9caaea4622e..0cbc7a9c716a049fa8ea083f3800219e8f44d237 100644
--- a/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.cpp
+++ b/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.cpp
@@ -78,6 +78,10 @@ NodeInstanceServerProxy::NodeInstanceServerProxy(NodeInstanceView *nodeInstanceV
       m_firstBlockSize(0),
       m_secondBlockSize(0),
       m_thirdBlockSize(0),
+      m_writeCommandCounter(0),
+      m_firstLastReadCommandCounter(0),
+      m_secondLastReadCommandCounter(0),
+      m_thirdLastReadCommandCounter(0),
       m_runModus(runModus),
       m_synchronizeId(-1)
 {
@@ -220,12 +224,13 @@ NodeInstanceClientInterface *NodeInstanceServerProxy::nodeInstanceClient() const
     return m_nodeInstanceView.data();
 }
 
-static void writeCommandToSocket(const QVariant &command, QLocalSocket *socket)
+static void writeCommandToSocket(const QVariant &command, QLocalSocket *socket, unsigned int commandCounter)
 {
     if(socket) {
         QByteArray block;
         QDataStream out(&block, QIODevice::WriteOnly);
         out << quint32(0);
+        out << quint32(commandCounter);
         out << command;
         out.device()->seek(0);
         out << quint32(block.size() - sizeof(quint32));
@@ -236,16 +241,17 @@ static void writeCommandToSocket(const QVariant &command, QLocalSocket *socket)
 
 void NodeInstanceServerProxy::writeCommand(const QVariant &command)
 {
-    writeCommandToSocket(command, m_firstSocket.data());
-    writeCommandToSocket(command, m_secondSocket.data());
-    writeCommandToSocket(command, m_thirdSocket.data());
-
+    writeCommandToSocket(command, m_firstSocket.data(), m_writeCommandCounter);
+    writeCommandToSocket(command, m_secondSocket.data(), m_writeCommandCounter);
+    writeCommandToSocket(command, m_thirdSocket.data(), m_writeCommandCounter);
+    m_writeCommandCounter++;
     if (m_runModus == TestModus) {
         static int synchronizeId = 0;
         synchronizeId++;
         SynchronizeCommand synchronizeCommand(synchronizeId);
 
-        writeCommandToSocket(QVariant::fromValue(synchronizeCommand), m_firstSocket.data());
+        writeCommandToSocket(QVariant::fromValue(synchronizeCommand), m_firstSocket.data(), m_writeCommandCounter);
+        m_writeCommandCounter++;
 
         while(m_firstSocket->waitForReadyRead()) {
                 readFirstDataStream();
@@ -271,6 +277,7 @@ void NodeInstanceServerProxy::processFinished(int /*exitCode*/, QProcess::ExitSt
 
 void NodeInstanceServerProxy::readFirstDataStream()
 {
+    static unsigned int lastCommandCounter = 0;
     QList<QVariant> commandList;
 
     while (!m_firstSocket->atEnd()) {
@@ -286,6 +293,14 @@ void NodeInstanceServerProxy::readFirstDataStream()
         if (m_firstSocket->bytesAvailable() < m_firstBlockSize)
             break;
 
+        quint32 commandCounter;
+        in >> commandCounter;
+        bool commandLost = !((m_firstLastReadCommandCounter == 0 && commandCounter == 0) || (m_firstLastReadCommandCounter + 1 == commandCounter));
+        if (commandLost)
+            qDebug() << "server command lost: " << m_firstLastReadCommandCounter <<  commandCounter;
+        m_firstLastReadCommandCounter = commandCounter;
+
+
         QVariant command;
         in >> command;
         m_firstBlockSize = 0;
@@ -300,6 +315,7 @@ void NodeInstanceServerProxy::readFirstDataStream()
 
 void NodeInstanceServerProxy::readSecondDataStream()
 {
+    static unsigned int lastCommandCounter = 0;
     QList<QVariant> commandList;
 
     while (!m_secondSocket->atEnd()) {
@@ -315,6 +331,14 @@ void NodeInstanceServerProxy::readSecondDataStream()
         if (m_secondSocket->bytesAvailable() < m_secondBlockSize)
             break;
 
+        quint32 commandCounter;
+        in >> commandCounter;
+        bool commandLost = !((m_secondLastReadCommandCounter == 0 && commandCounter == 0) || (m_secondLastReadCommandCounter + 1 == commandCounter));
+        if (commandLost)
+            qDebug() << "server command lost: " << m_secondLastReadCommandCounter <<  commandCounter;
+        m_secondLastReadCommandCounter = commandCounter;
+
+
         QVariant command;
         in >> command;
         m_secondBlockSize = 0;
@@ -344,6 +368,14 @@ void NodeInstanceServerProxy::readThirdDataStream()
         if (m_thirdSocket->bytesAvailable() < m_thirdBlockSize)
             break;
 
+        quint32 commandCounter;
+        in >> commandCounter;
+        bool commandLost = !((m_thirdLastReadCommandCounter == 0 && commandCounter == 0) || (m_thirdLastReadCommandCounter + 1 == commandCounter));
+        if (commandLost)
+            qDebug() << "server command lost: " << m_thirdLastReadCommandCounter <<  commandCounter;
+        m_thirdLastReadCommandCounter = commandCounter;
+
+
         QVariant command;
         in >> command;
         m_thirdBlockSize = 0;
diff --git a/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.h b/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.h
index 2c60d5daa24e10953a5bb8037980f7656c5b925e..3131d5c005c81240bc441662278451fecc3f9a13 100644
--- a/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.h
+++ b/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.h
@@ -97,6 +97,10 @@ private:
     quint32 m_firstBlockSize;
     quint32 m_secondBlockSize;
     quint32 m_thirdBlockSize;
+    quint32 m_writeCommandCounter;
+    quint32 m_firstLastReadCommandCounter;
+    quint32 m_secondLastReadCommandCounter;
+    quint32 m_thirdLastReadCommandCounter;
     RunModus m_runModus;
     int m_synchronizeId;
 };