Thanks for the reply.
I am not trying to use a library from a Time Machine backup. I have made a library from Time Machine by restoring it and that is the one I want to use.
It had worked just two weeks ago, but now I am getting the error message with only the "QUIT" option and the revolving circle indicating the program is trying but not suceeding.
I believe iPhoto is pointing to the pictures in my user's files - MacSSD/Users/JBL/pictures. I deleted a small iPhoto Library (7.4mb) that had been given a 3/14/14 designation and now there isn't an iphoto library in pictures. I'm not sure how that file got created, but iPhoto started last using the restored library that resides on an external hard drive.
How can I determine where iPhoto is pointing to find the library without opening iPhoto which I can't do because of the circular QUIT option?
Any further help will be most appreciated.