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?
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.)