receive rosbag play topics
hi, i want to receive rosbag play topics and use them in may source is there any help?
i use
ros::Subscriber sub = n.subscribe("/worldmodel/objects", 1000, chatterCallback);
but when i run rosbag play *.bag --clock i received this error :
ERROR] [1364626445.198828503]: Client [/listener] wants topic /worldmodel/objects to have datatype/md5sum [std_msgs/String/992ce8a1687cec8c8bd883ec73ca41d1], but our version has [worldmodel_msgs/ObjectModel/f9cae8b2109e6f4fe92735ca9596083c]. Dropping connection.
what shuold i do now?