Why are my pictures always missing when I print as pdf in vector?

why are my pictures always missing when I print as pdf in vector ?

Probably because pictures are inherently raster objects, not vector objects, and cannot be converted into vector objects.

it was pointed out as a bug in earlier versions, i need to export a vector plan with picture references. vector objects as vector and rester as raster.

What version of Rhino are you using?
How are the images put into the file?