My experience with P8 so far is that ti seems less tolerant to file paths and I know it is less tolerant and does not allow capital letters in extensions (the later has been reported to SM support). Try changing  search to deep.

Regarding the file paths make sure they are complete and correct. Easiest thing to do is open the file in a text editor and search on the letters .jpg to find them all. Had some older content where the reference did not include :runtime:textures: in the file paths and they worked in P7 and then PPro, that do not work correctly in P8.

Gary

"Those who lose themselves in a passion lose less than those who lose their passion"