Lloyd,
I'm running the latest versions of Poseidon and Luciferin. I've managed to spend a few more hours today on it. I stripped the A4000D to the bare minimum and repalced the Cybervision with a PicassoII from my A3000. Thinking this would solve any issues with CV3D. No joy same result.
I then replaced the Cyberstorm with the original A3630 (EC030 stock version). Deneb worked without any problems. All files transferred. I then put the Cyberstorm back in and I'm back to where I started - copies a couple of files and then reboots.
I reckon its got something to do with the Cyberstorm, but what I haven't been able to figure out. I've got the latest version of the 060.library, 040.library and 040Dummy.library in L: