Hi Bill, What platform? Mac? Windows? Linux? Also, what sorts of messages are you getting? And, just to make sure, did you insert a pointer to your .bib file at the end of your document by selecting Insert → List/TOC → BibTeX bibliography? All you say is that you stuck the file somewhere but LaTeX needs to know where to find it.
In my experience with all three platforms, if you install the latest version of TeX for your platform and then the latest version of LyX, things generally should Just Work. So if you haven't upgraded your TeX installation in a while I'd consider doing that and then installing Lyx 2.2.2. (You should rename your copy of LyX 2.0.5.1 first to avoid having it overwritten; it'll still work.) -chris > On 25 Jan 2017, at 3:16 PM, William Hanson <whan...@umn.edu> wrote: > > Dear All, > > I've created a BibTeX (.bib) file in Mendeley Desktop and used the Import > option in Mendeley to get this file into a folder in my main collection of > folders (outside Mendeley Desktop). But I can't get LyX to access this file > and create citations in documents I'm working on. When I try to insert a > citation into a document I'm given access only to an old list of citations, > not to those in the new file just mentioned. And I can't get LyX to let me > add the citations in the new file to the old list. > > I'm using LyX 2.0.5.1, which I've used for years. I've downloaded 2.2.2.2, > but but I can barely get started with it. It keeps telling me that I have to > add new files to make things work, but I'm unable to do so, and the Users > Manual doesn't help. > > What should I do? > > Bill Hanson