Every time I do a full Catalog sync, I get the same list of 21 missing files (attached). I finally decided to explore and found those files all in the place they are supposed to be (as noted in the "Missing files" list). Just to be sure, I selected those files, opened them and worked with them in the normal way, then ran "Scan to Catalog" again. Then did another CATALOG SYNC, and they are still listed as missing! What is going on?