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

Key is undefined

whenever I include an http link.

For example:




Here is a link to \href{}{The Short
Math Guide}


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

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

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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 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: 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

1 Answer 1

I guess you are using TeXLipse?

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

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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 at 13:55
sounds interesting. I am looking forward to your answer! – Marcel Aug 20 at 19:07
@Marcel - you can find it as the last comment to the question: – Bastian Ebeling Aug 21 at 20:39

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