Cannot open Photo.library of other Mac User.
Running Yosemite, and Photos 1.0 (Dutch version). As advised elsewhere, in order to allow Photo library being used by 2 users of same MAC, I created a 3rd 'shared data' user, to put shared Photo data. So with 1 of the users on MAC, I imported (old) iPhoto library in Photos, went fine, and copied the Photo.library file on the 'shared data' folder under folder Pictures. I created proper authorizations for both users to access this library. Now from the user by which I created this net Photo.library, I can open this library OK, but from the other user (same authorizations) I cannot open the library, error is 'Photo cannot restore permission'. I run the checkdisk program, run the program to restore permissions, but did not help. When I try to open this library on the 'shared data' user's folder from Finder, error says it cannot import pictures from the library. Thanks for advice.
iMac, OS X Yosemite (10.10.3), Photo 1.0