TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

When using the hyperref package, I keep getting this warning that says something like:

Key ftp://ftp.ams.org/pub/tex/doc/amsmath/short-math-guide.pdf is undefined

whenever I include an http link.

For example:




Here is a link to \href{ftp://ftp.ams.org/pub/tex/doc/amsmath/short-math-guide.pdf}{The Short
Math Guide}


I'm using pdflatex.exe to generate the output, and v6.82h of hyperref.sty.

share|improve this question

closed as too localized by Joseph Wright Oct 19 '11 at 9:36

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Your example document works fine for me. Is that the full error message you get? What version of hyperref are you using? – Jake Aug 25 '11 at 0:49
I am using the MikTeX distribution, with TeXlipse as a front end – bobobobo Aug 25 '11 at 0:49
The full warning text is Key ftp://ftp.ams.org/pub/tex/doc/amsmath/short-math-guide.pdf is undefined document.tex line 7 Problem – bobobobo Aug 25 '11 at 0:50
Your example works fine. But I can get an error ! Package keyval Error: ftp://ftp.ams.org/pub/tex/doc/amsmath/short-math-guide.pdf undefined. if I use angle brackets \href[..]{...} instead of correct braces: \href{..}{...}. So my guess is you didn't check your example but only believe that it demonstrates your real problem. – Ulrike Fischer Aug 25 '11 at 6:51
So sad this is closed, as the problem (I think from TeXlipse) persists. I use Eclipse 3.7.2 with current stable TeXlipse and latest MikTeX 2.9 under Windows. I also got those warnings. They can be eliminated (workaround) by adding \label{THE_UNDEFINED_LABEL} BEHIND \end{document} for each problem. – Bastian Ebeling May 21 '12 at 7:11

I guess you are using TeXLipse?

If this is the case your warnings maybe come from a bug in TeXlipse (this or this).

share|improve this answer
And the problem is not solved, yet. – Sven Aug 9 '12 at 14:10
I also have the problem, which was told by the originator. It seems it has nothing in common with you cited bugs. As it could be seend in the last (my) comment to the question, there is a workaroung. Could anyone please reopen the question to give me the Chance in answering with the Workaround? Thanks. – Bastian Ebeling Aug 20 '15 at 13:55
sounds interesting. I am looking forward to your answer! – Marcel Aug 20 '15 at 19:07
@Marcel - you can find it as the last comment to the question: bit.ly/TexlipseKeyUndef – Bastian Ebeling Aug 21 '15 at 20:39

Not the answer you're looking for? Browse other questions tagged or ask your own question.