ROS2 Play bag-file Error

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Hey guys,

Maybe one of you can help me: If I want to play a bag file (in ROS2 the .db3) the following Error occurs:

bryan@bryan:~$ ros2 bag play /home/bryan/Schreibtisch/rosbag2_2019_10_28-13_05_52/
DISCLAIMER
ros2 bag is currently under development and not ready to use yet
[INFO] [rosbag2_storage]: Opened database '/home/bryan/Schreibtisch/rosbag2_2019_10_28-13_05_52/'.

ROS 2 should be installed fine: If I'm using :

$ sudo apt install ros-crystal-desktop

There is everything up to date. After that I've downloaded the ROS2-BAG-PACKAGE as following:

$ sudo apt-get install ros-crystal-ros2bag* ros-crystal-rosbag2*

There is also everything up to date if I'm repeating this command. After that i have sourced the setup.bash

$ source /opt/ros/crystal/setup.bash

But the Error occurs again and again. If I try to play that file, 2 files are gonna be created (.db3-shm and .db3-wal), maybe thats an important fact.

Could anybody please help me?

Best

Ocooonni