http://answers.ros.org/question/187071/cannot-load-message-class-for-are-your-messages-built/ http://answers.ros.org/question/62430/are-your-messages-built-error-from-echoing-that-message-groovy/ https://github.com/epsilonorion/roscopter/issues/12 http://answers.ros.org/question/57103/error-cannot-load-message-class-forare-your-messages-built/

these answers did not help me.

in my workspace, I have my custom message stereo_msgs/RectifiedImage.msg I want to publish that.

when I do rostopic list, I can see "/mycustomtopic"

but when I do rostopic echo, "ERROR: Cannot load message class for [stereo_msgs/RectifiedImage]. Are your messages built?"

mymsgpub_ = nh.advertise("mycustomtopic", 1);

this is in my main function

and in my callback function (i am subscring to other message type),

mymsgpub_.publish(myimage);

pls help me out