Simulink stuck with Robotics Toolbox model initialization

I have seen here that there was a problem on Windows machines with matlab2017a. But I am on ubuntu 14.04 and I am using matlab2017b and I have the following problem.

I recorded a rosbag with the following topics:

path:        2018-03-01-15-13-41.bag
version:     2.0
duration:    1:13s (73s)
start:       Mar 01 2018 15:13:41.94 (1519913621.94)
end:         Mar 01 2018 15:14:55.92 (1519913695.92)
size:        5.8 GB
messages:    25640
compression: none [4359/4359 chunks]
types:       geometry_msgs/Pose             [e45d45a5a1ce597b249e23fb30fc871f]
             geometry_msgs/PoseArray        [916c28c5764443f268b296bb671b9d97]
             geometry_msgs/TransformStamped [b5764a33bfeb3588febc2682852579b0]
             sensor_msgs/CameraInfo         [c9a58c1b0b154e0e6da7578cb991d214]
             sensor_msgs/Image              [060021388200f6f0f447d0fcd9c64743]
topics:      /Drones/Pose                                 1233 msgs    : geometry_msgs/Pose            
             /apriltag/uv_array                           1393 msgs    : geometry_msgs/PoseArray       
             /camera/camera_info                          2966 msgs    : sensor_msgs/CameraInfo        
             /camera/image_raw                            2966 msgs    : sensor_msgs/Image             
             /vicon/boxAprilTag/boxAprilTag               8535 msgs    : geometry_msgs/TransformStamped
             /vicon/cameraFlea/cameraFlea                 8547 msgs    : geometry_msgs/TransformStamped

I created a simulink model with only a ROS subscribe block which subscribe to the topic

/apriltag/uv_array

which is a msg of type

geometry_msgs/PoseArray

I then play the rosbag I recorded and when I try to build the model everything is ok. When, instead, I try to run the model this gets stuck into the initializing phase and never gets out of it. How can I solve this problem?

Thanks in advance.