I can create a new collection, but I can’t add an item to it if the original image added into the catalog is off line. I get a dialog window saying “Adding 0 of 1 items to Collection” and the dialog disappears after about 60 seconds. (If the original image is online, addition to the collection works as expected.) “Search” and “Add/Modify” are checked for the catalog containing the desired images. I can’t add an item to a collection created in a previous version of PM+ either if the original image is off line. Adding new items to a catalog works as expected.
Marv
MacMini 2018
OS X 10.14.3
PM+ 6.0, build 4128 (7dbb043)