Hi.
In 4.7.4 when you have a PhAT for your skeletal mesh, and you decide to move the folder it is located it… it disassociates with the mesh and you lose all your information inside.
First it comes up and states
http://puu.sh/h8hI6/4de20d1b06.png
Even after reassigning the mesh, all the bodies, constraints and information is still gone. Leaving you do redo everything from scratch which takes a while to fine tune.
To reproduce this.
Have your Skeletal Mesh and PhAT in a folder. Set up PhAT. Make sure you are happy. Then save your project.
Now move the Skeletel mesh and your PhAT to a new folder in the project.
Try and open PhAT.