Okay...this is driving me crazy. I have multiple catalogs where the image files are reported missing (marked with: !) and when I go to locate the file in the finder and click "find nearby missing photos" Lightroom will not find them, but only attach to the single file I pointed it to. I have verified that the source images are, in fact, still there... I'm looking right at them. But Lightroom will not find them.
The original files are located on a qNap NAS, but that can't be the problem because this problem only occurs with *some* of my catalogs, not all of them. With some of my catalogs (located on the same NAS) "find nearby missing photos" works just fine.