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No matter how I try to do it I always get the following error :

! Package inputenc Error: Unicode char \u8:­ not set up for use with LaTeX.

I have tried using ­­­$^{\circ}$, \deg, \textdegree, pasting the ° symbol directly, to no avail.

Here is the header of my document, in case one of those could be causing the errors :

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I had the same issue. In my case it was an issue due to a misleading character in my bibdesk library. After exchange and a new run with BibTex everything was fine again. –  user12684 Mar 16 '12 at 12:10
A quick solution is to use the "Zap Gremlins" feature in the fantastic (and free to use) TextWrangler. This removes non-ASCII, control and NULL characters. IF you want a simple ASCII input file this will save you lots of time looking for invisible characters. –  boyfarrell Jul 1 at 10:55

4 Answers 4

up vote 45 down vote accepted

If you're getting literally that error—with no visible character after the \u8:—then what's probably happening is that you have some sort of invisible or space unicode character in your document. For instance, on my Mac, if I hit option-space, I get a non-breaking space, which gives an error that looks like that. You also might have some other character; a zero-width breakable space, for instance. If you copied and pasted your error, looking at the source of this page indicates that you might have a soft hyphen in your source (Unicode character 0xAD, representing a valid hyphenation point but not typeset unless there's a word-break). Thus, find the line it's occurring on, and comb through that line until you find it. Retype it if necessary, but a good editor should let you find it. Once you delete it, then your first three methods should work.

When I use your header (commenting out \frechbsetup, which doesn't seem to exist, and using \documentclass{article}), $^{\circ}$ renders as a largeish circle in the superscript position, $\deg$ renders as the upright text "deg", and \textdegree renders as a smaller circle. A literal ° doesn't work by default. To make it work, you can use \DeclareUnicodeCharacter{B0}{\textdegree}. This tells inputenc to treat the Unicode character 0xB0, the °, as though it were \textdegree, which is what you want. You could also use this to see if your problem is the soft hyphen; insert \DeclareUnicodeCharacter{AD}{\Huge [ICI]} to get the text [ICI] rendered into your document in huge letters wherever there's a soft hyphen. (Of course, if there's some other invisible character, you'll just get the error.)

Also, although I've never used it, you could try using XeLaTeX instead of PDFLaTeX; it has full UTF-8 support out of the box.

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Indeed, an invisible character seemed to be the source of my problem. Thanks! –  levesque Oct 18 '10 at 17:14
No problem. I remember how befuddled I was the first time I ran into this problem; I'm glad I could help someone else out with it. –  Antal S-Z Oct 18 '10 at 17:35

I got this error after copying a word from my browser and pasting it into my editor. Just retyped it an the problem was solved.

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instead of [utf8] solved the problem for me. Hope this helps,


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\usepackage{textcomp} is missing.

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protected by Martin Scharrer Jan 18 '13 at 15:34

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