Sorry, Marque, I mispoke. I recreated a similar situation, and it locked (coincidentally) on the third attempted switch. But I'd seen no File Dialog, nor had the Windoze Explorer open on that drive. Retried, loading just the last figure that I'd loaded before and it lock immediately. Seems that Poser only needs to have to search INTERNALLY for a texture, and it goes into a sulk, forgets to release the directory, and the file lock issue is triggered. Ran Correct Reference on the figure's library and sure enough it corrected a few files. After that I repeated my steps with no file lock. In my case it was a prop (hair) loaded along as part of the figure's cr2 that had the misplaced texture.