Not sure that this makes sense. I just downloaded the elements in question yesterday. Also, I did not receive this issue the first few times I worked on this project. After saving closing and reopening things were fine. The only thing I can thing of is that DAZ has crashed a few times during my work.
I took a look in the log and found several errors of files not being able to load such as:
Failed to load image: /Library/Application Support/DAZ 3D/My DAZ Library/Users/**********/Library/Application Support/DAZ 3D/Studio4/temp/d130.tif
(Ignore the asterisks that I used to hide my username)
So, what doesn’t make sense is that the only thing listed in /library/Application Support/DAZ 3D/ folder is the dzinstall.ini