BibTex citation file issue OJS

We exported BibTex file from OJS tried to import it in Jabref ( BibTex tool and I have got error message:

  1. Error occurred when parsing entry: ‘Error in line 1: EOF in mid-string’. Skipped entry.
    I tried to import in CiteULike and I again have got error message
    I suppose this is parsing error. Please advise how to correct this.