OpenCV Error: Null pointer (NULL guiReceiver (please create a window)) in cvDestroyWindow, file /tmp/binarydeb/ros-kinetic-opencv3-3.2.0/modules/highgui/src/window_QT.cpp, line 511
terminate called after throwing an instance of 'cv::Exception'
what(): /tmp/binarydeb/ros-kinetic-opencv3-3.2.0/modules/highgui/src/window_QT.cpp:511: error: (-27) NULL guiReceiver (please create a window) in function cvDestroyWindow