In the version of mGear 3.6.0, it is found that the Select child controls in dagmenu can only select one child control, not all child controls.
The picture above is before modification, and the picture below is after modification.The component type in the picture is chain_01.
For this I modified the python script:
mgear_3.6.0\scripts\mgear\core\dagmenu .py
In the picture, yellow is the old code and red is the new code.
Thanks!