diff --git a/camerasetup.cpp b/camerasetup.cpp
index 10972c3..1486985 100644
--- a/camerasetup.cpp
+++ b/camerasetup.cpp
@@ -10,6 +10,7 @@ SingleCamera::SingleCamera (QWidget *parent) :
         this->layout()->addWidget(camera1Preview);
 }
 
+
 CameraLayout SingleCamera::cameraLayout(){ 
     CameraLayout l;
     qDebug() << "Request layout";
@@ -20,6 +21,7 @@ CameraLayout SingleCamera::cameraLayout(){
     return l;
 }
 
+
 SingleCamera::~SingleCamera(){
     if (camera1Preview != nullptr) {
         delete camera1Preview;
@@ -33,7 +35,8 @@ DualCamera::DualCamera (QWidget *parent) :
     camera1Preview(nullptr),
     camera2Preview(nullptr),
     primary_device("") {
-        qDebug() << "DualCamera View ... ";
+        qDebug() << "DualCamera View constructor... ";
+        std::cerr << "DualCamera View constructor... " << std::endl;
         this->setLayout(new QHBoxLayout(this));
         camera1Preview = new CameraPreview();
         camera2Preview = new CameraPreview();
@@ -46,11 +49,17 @@ DualCamera::DualCamera (QWidget *parent) :
 
 
 void DualCamera::updateROI1(int x, int y, int w, int h) {
-    camera2Preview->setSize(w, h);
+    qDebug() << "Update ROI1: x " << x << " y " << y << " w " << w << " h " << h;
+    if (camera2Preview != nullptr) {
+        camera2Preview->setSize(w, h);
+    }
 }
 
 void DualCamera::updateROI2(int x, int y, int w, int h) {
-    camera1Preview->setSize(w, h);
+    qDebug() << "Update ROI2: x " << x << " y " << y << " w " << w << " h " << h;
+    if (camera1Preview != nullptr) {
+        camera1Preview->setSize(w, h);
+    }
 }
 
 void DualCamera::switchArrangement() {
diff --git a/camerasetup.h b/camerasetup.h
index de39834..99b5292 100644
--- a/camerasetup.h
+++ b/camerasetup.h
@@ -62,7 +62,7 @@ public:
 
 
     void setPrimaryCamera(QString &device) {
-        qDebug() << "Update primary camera";
+        qDebug() << "Update primary camera to " << device;
         if (camera1Preview != nullptr) {
             camera1Preview->setCamera(device);
             primary_device = device;
@@ -71,7 +71,7 @@ public:
 
 
     void setSecondaryCamera(QString &device) {
-        qDebug()<< "Update secondary camera";
+        qDebug()<< "Update secondary camera to " << device;
         if (camera2Preview != nullptr) {
             camera2Preview->setCamera(device);
         }