rostipic echo doesn't work because of a md5sum problem
Hi, I am playing a bag file and I typed rostopic echo /nav_status to see the actual messages but this error message appears. What's going on? I saw other similar questions but I don't understand them. Thanks
[ERROR] [1638128325.171514535]: Client [/rostopic_4147_1638128309790] wants topic /nav_status to have datatype/md5sum [marta_msgs/NavStatus/ccb836e840c83634382508157bfdb91e], but our version has [marta_msgs/NavStatus/2652576ed189854bff45893603a05bc0]. Dropping connection.