Cannot open library

I have been building the library for some months, in a Pages document,  and today I cannot open it. It comes up with the following message:  The document “Social Policy Library.enl could not be opened”. Quite distressing.   Any help would be very much appreciated.  Thank you.

Try tech support, because we haven’t a clue!  It shouldn’t have anything to do with pages.  Did you move your library (without moving the associated .DATA folder)?