diff --git a/src/MocapNET2/MocapNET2LiveWebcamDemo/livedemo.cpp b/src/MocapNET2/MocapNET2LiveWebcamDemo/livedemo.cpp
index 669b841..223db81 100644
--- a/src/MocapNET2/MocapNET2LiveWebcamDemo/livedemo.cpp
+++ b/src/MocapNET2/MocapNET2LiveWebcamDemo/livedemo.cpp
@@ -343,7 +343,9 @@ int main(int argc, char *argv[])
                                                         1// We will do the waitKey call ourselves
                                                     );
 
-                                                    imshow("Skeletons", viewMat);
+                                                   if ( (viewMat.size().width >0) && (viewMat.size().height>0) )
+                                                      { imshow("Skeletons", viewMat); } else 
+                                                      { std::cerr<<"Invalid skeleton visualization frame.. \n"; }
                                                 }
                                         }
                                 }
diff --git a/src/MocapNET2/MocapNETLib2/visualization/visualization.cpp b/src/MocapNET2/MocapNETLib2/visualization/visualization.cpp
index e452085..5f9ab41 100644
--- a/src/MocapNET2/MocapNETLib2/visualization/visualization.cpp
+++ b/src/MocapNET2/MocapNETLib2/visualization/visualization.cpp
@@ -1562,8 +1562,10 @@ int visualizePoints(
 */
 
     //At last we are able to show the window..
-    cv::imshow(windowName,img);
-    
+    if ( (img.size().width >0) && (img.size().height>0) ) { cv::imshow(windowName,img); } else 
+                                                          { std::cerr<<"Invalid visualization frame.. \n"; }
+
+
     if (save3DVisualization)
     {
         char filename[512];