Cycles won't render

I have this file – Cycles won’t render on one of my computers. The skydome is supposed to emit (and it does on one of my computers) but on the other – nothing. If I change the world color I get some lighting – but nothing from the skydome. Any ideas?

I am just trying to use CPU render – can’t get GPU to work either. But that is another issue

To make myself clear – the cone that is the sky has an image texture, and is set to emit light. But it doesn’t.

Very frustrated.

This one is known. You need to save texture on disk, then reassign. Cycles hate packed files.

is that it?!

Arghh. Thanks for the help.