When you get file missing, I have found that the full path is wrong. It may be looking in the (default Daz Content library) C:\Users\username\.... but doesn't tell you that in the message. The message tends to show the path relevant to the top of the content library.
If you right-click on the icon, Browse to file location, and you can edit the file via a text editor you can check the true path in there and compare to the location where you know it to be (and change it as requried - caution with the : or \ characters)
Edited by PeteHol on 03/14/14 08:08 AM.