Either correct the path or add the requested image
\begin_inset Graphics
- filename ../doc/clipart/3D-structure-distort.pdf
+ filename ../../doc/clipart/3D-structure-distort.pdf
lyxscale 66
width 4cm
\begin_inset Graphics
- filename ../doc/clipart/Star-structure.pdf
+ filename ../../doc/clipart/Star-structure.pdf
width 4cm
\end_inset
\begin_layout TitleGraphic
\begin_inset Graphics
- filename ../doc/clipart/3D-structure-distort.pdf
+ filename ../../doc/clipart/3D-structure-distort.pdf
lyxscale 30
scale 10