I have a problem within ShareLaTex. I get the following error message:

Unicode char' (U+301)

I received it after adding references to my bib file. U+301 seems to refer to ~ signs or accents. That makes sense since I tried to input some Czech names including accents on letters.

What is strange: by now I deleted all of the references that I had recently added as I suspected a problem in them. Still, the References will not update after compiling.

I am using the following specifications:

  • Try to delete the temporary files, especially the .bbl and if that does not help also the .bcf. – moewe Mar 9 '16 at 14:19
  • 2
    Since you are using ShareLaTeX here are a few pointers on how to remove temporary files there: How do you make Biblatex work in ShareLaTeX?, http://tex.stackexchange.com/q/284342/35864. – moewe Mar 9 '16 at 14:25
  • You are my hero of the day ;) – Jenny Mar 9 '16 at 14:55
  • @moewe -- since your comments seem to have answered the question, maybe an actual answer is in order. and an addition of sharelatex to the tags. – barbara beeton Mar 9 '16 at 20:34
  • @barbarabeeton Done! – moewe Mar 10 '16 at 6:56

The evil characters still reside in the .bbl file (which is read by TeX when it prints the bibliography) even after the .bib was updated. A Biber run is required for these changes to propagate to the .bbl.

The Biber run, however, can only succeed if the .bcf file (which biblatex uses to communicate with Biber) is well-formed. If the LaTeX run had to be aborted due to an error, often the .bcf is malformed.

This can leave you in a vicious circle of malformed files. (The handling of those has changed recently, so you might be fine after a few runs if you plough on ignoring the errors).

To make sure the problem does not appear you have to remove the .bbl and .bcf files and recompile.

In ShareLaTeX just press the Logs & Other Files button next to Recompile and then the little dustbin at the bottom of the rightmost pane, you will be asked to confirm that you want to delete the temporary files. See also Obtaining .bbl file from sharelatex output

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