Unable to launch gazebo Cannot mix incompatible Qt library

asked 2020-01-15 00:17:23 -0600

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I got a problem when launch gazebo empty_world by using this command

roslaunch gazebo_ros empty_world.launch

Got an error

[gazebo_gui-3] process has died [pid 9940, exit code 134, cmd /opt/ros/melodic/lib/gazebo_ros/gzclient __name:=gazebo_gui __log:=/home/eko_rudiawan/.ros/log/8d0c817e-375c-11ea-9da8-94b86d292534/gazebo_gui-3.log].
log file: /home/eko_rudiawan/.ros/log/8d0c817e-375c-11ea-9da8-94b86d292534/gazebo_gui-3*.log

But running gazebo using start menu is normal. Try run from terminal with command

gazebo --verbose

Got an error message

[Msg] Waiting for master.
[Msg] Waiting for master.
[Msg] Connected to gazebo master @
[Msg] Publicized address:
[Msg] Connected to gazebo master @
[Msg] Publicized address:
[Err] [GuiIface.cc:124] Cannot mix incompatible Qt library (version 0x50905) with this library (version 0x50c05)

The problem looks like incompatible with QT library I usually run ROS with Conda environment, and check the version with qmake --version

QMake version 3.1
Using Qt version 5.9.7 in /home/eko_rudiawan/anaconda3/envs/ros_env/lib

Is there any solution to solve this problem?? I used ROS Melodic in Linux Mint 19.3 Tricia with Gazebo 9 installed

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Interesting. Not sure what mechanism is using the loader to complain about Qt versions but seems like a mix of qt 5.9.5 and 5.12.5 (if I'm not wrong with hex). Which qt version do you have in Mint? Where does gazebo come from (Conda?, Mint?)?

Jose Luis Rivero gravatar imageJose Luis Rivero ( 2020-01-23 10:24:23 -0600 )edit

I checked with installed QT version with

dpkg -l | grep libqt

It is listed qt 5.9.5, I use Linux mint 19.3 and gazebo is installed with ROS

ekorudiawan gravatar imageekorudiawan ( 2020-01-23 20:16:02 -0600 )edit

The version is conda https://anaconda.org/conda-forge/qt seems to be 5.12.5, which are the versions displayed by the error command. My hypothesis is that there is a conflict somehow between them, although I have no idea how can you solve it.

Jose Luis Rivero gravatar imageJose Luis Rivero ( 2020-01-27 11:37:06 -0600 )edit