Hello.<br>i have an Ubuntu 10.04 and Ros diamondback.<br><br>I try to do image_transport tutorial (<a href="http://www.ros.org/wiki/image_transport/Tutorials">http://www.ros.org/wiki/image_transport/Tutorials</a>)<br><br>i run (as here <a href="http://www.ros.org/wiki/image_transport/Tutorials/ExaminingImagePublisherSubscriber">http://www.ros.org/wiki/image_transport/Tutorials/ExaminingImagePublisherSubscriber</a>)<br>
<br>-------------------------------------------------------------------------------------------<br>alexander@alexander-laptop:~/learning_image_transport$ rosrun learning_image_transport my_publisher home/alexander/image.jpg <br>
---------------------------------------------------------------------------------------------<br><br>And i got next error:<br>-----------------------------------------------------<br>OpenCV Error: Null pointer (NULL array pointer is passed) in cvGetMat, file /tmp/buildd/ros-diamondback-vision-opencv-1.4.3/debian/ros-diamondback-vision-opencv/opt/ros/diamondback/stacks/vision_opencv/opencv2/build/opencv-svn/modules/core/src/array.cpp, line 2380<br>
terminate called after throwing an instance of 'cv::Exception'<br>  what():  /tmp/buildd/ros-diamondback-vision-opencv-1.4.3/debian/ros-diamondback-vision-opencv/opt/ros/diamondback/stacks/vision_opencv/opencv2/build/opencv-svn/modules/core/src/array.cpp:2380: error: (-27) NULL array pointer is passed in function cvGetMat<br>
<br>Aborted<br>--------------------------------------------------------------------------<br><br>How can i correct this situation?<br><br>Thank you<br>