Theofilos Strinopoulos wrote:
Why does lyx not recognize acm_cit_thesis.cls?
You need a layout file for your thesis class. You can take the file
book.layout that comes with LyX, change its first two lines to
#% Do not delete the line below; configure depends on this
# \DeclareLaTeXClass{acm_cit_thesis}
save it under e.g. the name "ACMThesis.layout" in LyX's layouts
directory, and then reconfigure LyX.
You find detailed informations about LyX's layout files in LyX's
customization manual chapter 5.
regards Uwe
