MutableScatterXY.new("xxx") failed in the reactive script

[TakaHoribe]

Problem description

Thanks for the great work of the PlotJuggler.

I used the reactive script following the tutorial. It worked very well in the old version of the binary release of ros-galactic-plotjuggler (3.4.2-1focal.20220430.111249), but after the version upgrade to the latest: 3.4.4-1focal.20220517.013511, it got failed with an error message as in the screenshot below.

After some tests, I found MutableScatterXY.new("xxx") could be a problem.

Steps to reproduce (important)

• OS: x86_64 Ubuntu20.04 5.15.0-41-generic
• PlotJuggler Version: 3.4.4-1focal.20220517.013511

Write the following code in the function area and save it.

new_series = MutableScatterXY.new("xxx")

Start subscribing a ros topic. I just published the twist with following command and subscribe in the plotjuggler.

ros2 topic pub /cmd_vel geometry_msgs/msg/Twist "{}" -r 1

And then the error message will pop up every time the topic is received.

---

checks in other versions

I checked with different versions from source build

• 3.4.2: OK (no error). Same as binary install.
• 3.5.0: NG (error)
• main (d2b6b73):NG (error)

[facontidavide]

I will try to address this ASAP

[facontidavide]

This was renamed in February "ScatterXY"