Dances with Bees
i only have the base.
Constrained: Each cloth object can have one constrained group. An empty constrained group is automatically created when you clothify an object. Constrained vertices “stick” to corresponding polygon faces of the underlying figure and are useful for cloth areas that have to follow the movement of the underlying body part. They can be used to prevent straps on a dress from slipping... from Poser manual
Can't say if it's part of full plugin or it's Poser-only feature - don't have full plugin.the dress you are using does have some features set on it that you don't currently have installed since you're only using the basic dynamic plugin. So that could be part of the issue as well...
Can't say if it's part of full plugin or it's Poser-only feature - don't have full plugin.
Checked: yes, in Poser dress is "pinned" above the breast, so it will not work in DS as intended.