Problem with Swift env.step(dt) in the new version

[waelbachta]

Hi,

I am running the toolbox using an ubuntu 20.04 environment. When launching an example with swift, I get the following error :

File "demo.py", line 60, in
env.step(0.000001)
File "/home/wael/TP_NEW/venv/lib/python3.8/site-packages/swift/Swift.py", line 209, in step
obj._propogate_scene_tree()
AttributeError: 'NoneType' object has no attribute '_propogate_scene_tree'

Thank you for your help !

Wael.

[DevilCJS89]

The key words: AttributeError: 'NoneType' object has no attribute '_propogate_scene_tree'
you should chek your packages use"pip list "or "conda list"
rename the wrong file name
run again
if there are any question , I'll try my best to help you resolve it.

[petercorke]

Hi @waelbachta, thank you for your report, and I'm sorry for the long delay: various life events got in the way, and since May I've been doing major work across the Robotics Toolbox, Swift and SpatialGeometry.

This was reported against a 2022 release, and both the toolbox and Swift have had many releases since, so I'm closing it as outdated. If you still see it with the current releases (RTB 1.4.4, Swift 2.0.1), please post an Issue with your versions (pip list | grep -i -E "roboticstoolbox|swift|spatial") and a minimal example.

In future, please post bug reports as an Issue rather than a discussion item. Thanks also to @DevilCJS89 for trying to help.