I am having the exact same problem as the OP in this thread: Lyx: can't import LaTex file With the .tex file linked below (via DropBox). It's the submission template for the Journal of ...
I've been producing a technical book in Lyx. I've decided that for this work, I'ld be better off using Adobe Indesign. it need allot of complex layout/graphical stuff. Like timelines, sidebars, ...