Issue with readMessages Vector 3

Having an issue using readMessages for a rosbag file:

>> bag = rosbag('tb1.bag')

bag = 

  BagSelection with properties:

           FilePath: 'C:\Users\xpxla\Documents\MATLAB\TurtleBot\tb1.bag'
          StartTime: 1.5988e+09
            EndTime: 1.5988e+09
        NumMessages: 23454
    AvailableTopics: [12×3 table]
    AvailableFrames: {2×1 cell}
        MessageList: [23454×4 table]

>> velSel = select(bag, 'Topic','/cmd_vel')

velSel = 

  BagSelection with properties:

           FilePath: 'C:\Users\xpxla\Documents\MATLAB\TurtleBot\tb1.bag'
          StartTime: 1.5988e+09
            EndTime: 1.5988e+09
        NumMessages: 43
    AvailableTopics: [1×3 table]
    AvailableFrames: {2×1 cell}
        MessageList: [43×4 table]

>> msgStructs = readMessages(velSel,'DataFormat','struct')
No definition for Vector3
Message def:
# This expresses velocity in free space broken into its linear and angular parts.
Vector3  linear
Vector3  angular

Is it because the rosbag is broken?

[Cristian Navarro]

Did you get through this ? I have the same issue