Bookmark level difference when using hyperref

Question

When creating my output with miktex in texniccenter I get the following warning

Difference (2) between bookmark levels is greater than one, level fixed on input line 3

Can someone explain this warning to me and perhaps give me a hint for a solution of the problem?

Answer 1

That message is emitted by the hyperref package. Usually it means that you've skipped a level of headings. Something like:

\chapter{Chapter heading}
% skipping the \section -- bad move
\subsection{Subsection heading}

Check your document to make sure that you have all your headings in order and haven't skipped any in the hierarchy.

(That being said, it is only a warning, so it can be ignored if you like.)