Scene Tools Set 3 problems
When "Scene Tools Set 3" came out it worked great. But I think it has had 2 updates since then and those updated scripts messed up most of my characters - so I reverted back to the first release as that still works. There's a new update and I tried it but same thing happens. Messing up my saved characters. I did report it to Daz years ago and mailed the creator but never heard anything back.
The tool should mirror poses and it works on a default Gen8 character. But after trial and error I found out some hair products messes up the mirrow posing. The worst is "Linda Ponytails Hair for Genesis 8". If a character has that it on it will look like the attached image after mirroring the pose several times in zero pose. In zero pose it shouldn't move at all - but it does and moves its arms and distort the face.
Anyone know how to fix this or am I forced to use the first version of this script?

Comments
I tried a number of different hairs, and all seemed to distort or not mirror properly (i.e., arms and legs did not mirror, or distort the face) IF the Hair is fit to, and parented to, G8F (normal application, in most cases).
However, if the hair is un-parented from the figure, but still fit to it, all mirror poses work. No distortion of the face, limbs mirrored properly.
That is a bizarre one...
Do you have a link to the product? Stupid store search can't find any such product by that name, even in quotes.
Nevermind. Goggle search found it in about a millisecond. https://www.daz3d.com/daz-studio-4-scene-tools-set-3--pose-symmetry