Can download article by DOI but not title

[notuntoward]

If I click the New Bibtex Entry button, paste this DOI:

http://dx.doi.org/10.1016/j.engappai.2016.01.001

into the ID field, and then click the Generate button, then Jabref successfully downloads the article's BibTeX entry.

But if I instead paste the article's title into the ID field, change the ID Type to Title, and then click Generate, I get the error shown in this screenshot:

I'm using the title string:

Traffic flow optimization: A reinforcement learning approach

This is with:

JabRef 3.8.1 windows 7 6.1 amd64  Java 1.8.0_111

[Siedlerchr]

Hi, yes it's a bit confusing.
The ID-based fetcher is the prefered way. You enter an unique identifier, e.g. a DOI, an ISBN or another identifier. Then the bibtextdata is pulled from that identifier.

The title based fetcher works the other way round: It searches www.crossref.org for the title and tries to get a doi for it. If a doi is found, the bibtexdata is pulled from it.
Also a manual search at Crossref with the title revealed the article with a doi, it might be a problem with the CrossRef api.

[stefan-kolb]

It is a problem of the Crossref API. For some reason it only lists the entry as second result, but we only check the best result inside the CrossRef fetcher:
https://search.crossref.org/?q=Traffic+flow+optimization%3A+A+reinforcement+learning+approach

[stefan-kolb]

Ok, I relaxed the Crossref fetcher a bit. It checks more results now, in case the Crossref API does some wierd things like in that case.
You can try a build from http://builds.jabref.org/crossref-fetcher.