Object missing from render after applying array.

This is a bit odd. The main model is being created on layer 1, I use a different layer to create objects and get them right before I move them to the first layer.

Many thanks to Richard who provided a fix for my array problems. I created the object that needed the array, applied the modifier and I have the result required.

Then, I move the object to layer 1, put it in place, render, and It’s missing. It doesn’t show at all. I’ve moved the object to different layers and have the same result.

To be further confusing, the object shows in the design view, beautifully rendered, but it’s still missing from the final render window.

I’ve been through all the visibility options without finding anything useful.

Any ideas?
Thanks,
Tull.