自定义主题发布Path消息不可在rviz显示，运行ros2 topic echo报warning

[1052095713]

求助大佬们：
主题发布如下

self.path_pub = self.create_publisher(Path,"/path_my_A_star", 10 )

    

    def publisher_path(self):
        print('Start Publishing the msg!!!')
        time = 1
        y1 = []
        y2 = []
        for i in range(self.path_map.shape[1]):
            current_time = self.get_clock().now().to_msg()
            current_pose = PoseStamped()
            current_pose.pose.position.x, current_pose.pose.position.y= self.mapToWorld(self.path_map[0][i], self.path_map[0][i])
            y1.append(self.mapToWorld(self.path_map[0][i], self.path_map[0][i])[0])
            y2.append(self.mapToWorld(self.path_map[0][i], self.path_map[0][i])[1])
            current_pose.pose.position.z = 0.0
            current_pose.pose.orientation.x = 0.0
            current_pose.pose.orientation.y = 0.0
            current_pose.pose.orientation.z = 0.0
            current_pose.pose.orientation.w = 1.0
            time += 1
            self.current_path.header.stamp = current_time
            self.current_path.header.frame_id = "odom"
            self.current_path.poses.append(current_pose)
            self.path_pub.publish(self.current_path)
            self.last_time = current_time
        
        print('Finish Publishing the msg!')

rviz并不显示path

由于rviz无法显示path轨迹，利用topic echo检看msg但是结果如下

peter@ubuntu:~$ ros2 topic echo /path_my_A_starh
WARNING: topic [/path_my_A_starh] does not appear to be published yet
Could not determine the type for the passed topic