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I tried to install pdf-tools under emacs 24 and Ubunt 16.04, like I did it several times succesfully.

But now I get the error messages:

Symbol's function definition is void: pdf-tools-install

PDFs are still opened with the docview mode.

When I use M-x pdf-tools-install after Downloading from Melpa I get the message "Sever build succesfully".

Any ideas what's gone wrong?

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  • Set debug-on-error to t. Post the backtrace. Some code you are invoking tries to invoke function pdf-tools-install, but the code that defines that function has not been loaded. – Drew May 31 '17 at 16:22
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    That function should be autoloaded by package-initialize. – politza Jun 1 '17 at 0:30
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    My guess is that you are trying to run that code before packages are initialized. Try adding (package-initialize) near the beginning of your init file, and definitely before trying to invoke pdf-tools-install – YoungFrog Jun 1 '17 at 9:07
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(package-initialize) was missed in my init.el.

Thanks to all for your help!

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