On Tue, 26 Dec 2017, Påvel Nicklasson wrote:
It is possible to use fncychap with KOMA-book, even if not recommended.
The warning is caused by fncychap that uses the depreciated command /rm.
To avoid the warning insert these lines after the loading of fncychap in
the Preamble:
\ChTitleVar{\bfseries\Large\rmfamily}
\ChNameVar{\bfseries\Large\sffamily}
Depending on style you might need to adjust the size of the font.
The recommended solution is, as Jürgen suggests, to explore the
possibilities of the KOMA-Book.
Påvel,
As I just wrote to the mail list I've not found these possilbities in
today's reading of chapters 3, 5, and 17 in the manual.
Thanks very much for your suggestions,
Rich