Issuing M-x org-html-htmlize-generate-css gives the error

Invalid face: font-lock-string

What does this error mean and how can I correct it?

Issuing $ grep -r "font-lock-string[^-]" ~/.emacs.d/ returns

~/.emacs.d/elpa/solarized-theme-20160106.15/solarized.el: `(kite-string((,class (:inherit font-lock-string))))
  • 2
    I don't know, but forcing it to print the stack trace might help to investigate. To get the stack trace do M-x toggle-debug-on-error.
    – wvxvw
    Jan 12, 2016 at 12:32
  • I guess you have a source block in your org-file and this source code block uses some wired programming major mode. Try to open a file with that major mode. Does this work or do you get the same error message? Please give a minimal example for error reconstruction. Try with emacs -Q only loading the modes you really need for the reconstruction of the problem.
    – Tobias
    Jan 12, 2016 at 14:06
  • 1
    Beyond turning on debug-on-error (@wvxvw's good suggestion), you can follow the evaluation to see exactly what goes wrong, by: (1) loading the source file that defines function org-html-htmlize-generate-css, (2) M-x debug-on-entry RET org-html-htmlize-generate-css, (3) use d to step through the evaluation (or c sometimes, to skip through uninteresting parts). Keep the source code open in another frame, so you can follow better.
    – Drew
    Jan 12, 2016 at 15:03
  • You can also check what the current definition of font-lock-string is, using M-x customize-face RET font-lock-string RET. If it says mismatch then look for what is wrong, or try customizing it again, starting with the original value.
    – Drew
    Jan 12, 2016 at 15:05
  • 1
    @Dew When I try completion with M-x customize-face on font-lock-string I only get font-lock-string-face that makes me suspicious that there is some source code block in the OP's org file with a major mode that wrongly uses font-lock-string instead of font-lock-string-face.
    – Tobias
    Jan 12, 2016 at 15:10


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