diff --git a/src/colnod/syncmanager.cpp b/src/colnod/syncmanager.cpp
index 442a23b..342d1ab 100644
--- a/src/colnod/syncmanager.cpp
+++ b/src/colnod/syncmanager.cpp
@@ -45,7 +45,6 @@ bool SyncManager::startSynchronization()
 
     qInfo(syncmanager) << equals;
     qInfo(syncmanager) << "SYNCHRONIZATION BEGIN";
-
     qInfo(syncmanager) << equals;
     qInfo(syncmanager) << "DOWNLOADING DATA -> BEGIN";
     qInfo(syncmanager) << dash;
@@ -62,15 +61,14 @@ bool SyncManager::startSynchronization()
 
     colnod->downloadData(mlastSync.timestamp());
     connect(colnod.get(), &ColnodAPI::downloadDataFinished, [=](std::shared_ptr<Data> colnodData) {
-        qInfo(syncmanager) << "DOWNLOADING DATA -> FINISHED";
-        qInfo(syncmanager) << equals;
-
         if (!colnodData) {
             qCritical(syncmanager) << "Not possible to get correct data from colnod";
             QCoreApplication::exit(-1);
             return;
         }
 
+        qInfo(syncmanager) << "DOWNLOADING DATA -> FINISHED";
+        qInfo(syncmanager) << equals;
         // NOW I SHOULD HAVE VALID DATA FROM COLNOD
 
 
@@ -92,7 +90,11 @@ bool SyncManager::startSynchronization()
         }
 
         // data is processed to other sides
-        connect(colnod.get(), &ColnodAPI::dataProcessFinished, [&](){
+        connect(colnod.get(), &ColnodAPI::dataProcessFinished, [&](bool success){
+            if (!success) {
+                qCritical(syncmanager) << "Not possible to upload data to colnod";
+            }
+
             qInfo(syncmanager) << "PROCESSING DATA -> FINISHED";
             qInfo(syncmanager) << equals;
 
@@ -105,6 +107,7 @@ bool SyncManager::startSynchronization()
 
             // updated data are ready
             connect(tokensRequest.get(), &serversdk::Request::finished, [=](){
+
                 auto uploadedData = std::make_shared<Data>();
                 uploadedData->loadTokensFromJson(tokensRequest->responseData());
 
@@ -139,9 +142,7 @@ bool SyncManager::startSynchronization()
 
 
         });
-        colnod->processData(preparedData->databaseData);  // TODO: errors???
-
-        //qCritical(syncmanager) << "Not possible to upload data to colnod";
+        colnod->processData(preparedData->databaseData);
     });
 
     return true;
@@ -162,7 +163,7 @@ std::unique_ptr<PreparedData> SyncManager::prepareDataNew(const std::shared_ptr<
     qInfo(syncmanager) << "Resolve conflicts ( changes on same item on both Colnod and DB ):";
     qInfo(syncmanager) << dash;
 
-
+    // add all data which should be pushed to database
     for (const auto &colnodToken : colnodData->updatedTokens) {
 
         // not conflict so add to prepered tokens