BibTeX, biblatex and biber ⇒ References from JabRef not importing to LyX

[splatex]

I have a .bib file made in JabRef that I am trying to use in a Lyx file. I have inserted the "BibTeX Generated Bibliography" at the end of the LyX file. However, when I try to include a citation, the list of available citations does not include all the references in my .bib file; the list only includes older ones. In fact, a few citations that were originally on the list that I included in the document have now been replaced by ??(??) and no longer appear in the list (although they still compile to the correct citation in the pdf). Any help on how to access all references in the .bib file would be much appreciated!

[splatex]

Resolved-turns out I had an error in my .bib file (some unrecognized black box character)!