LaTeX.org

Thank you both for your help! The problem is solved!

Dear all,

I am not a very experienced LaTeX user, however, now I write my thesis in it. At the moment I was almost done and just wanted to change the page numbering, I received the following error:

./article_2.toc:1:
pdfTeX error (ext1): \pdfendlink cannot be used in vertical
mode.
\close ...