I have some problems using LyX.
So I have a blank custom cover page but I use the preamble to put some LaTeX code and do my stuff (write text, import picture, title, author, etc.).
I have my
main.lyx where I include my blank cover page.
So if I use the preview from the cover page I can the all the thing that I have done in the preamble but if I try the preview from
main.lyx I get the error message:
Lyx : Output is Empty
No output file was generated.
I am a bit lost. Do I need to put the preamble in my