Hi Tom,
Thanks for the reply, yes it was a glitch when I closed CO one my desktop and copied the cat to the SSD, I don't think it had closed properly hence it not working on another machine.
I simply opened it as usual on the desktop, shut it down. waited, copied it to the SSD and wallah... it works wherever the ssd is plugged into.
For clarification, the 2TB SSD has about 1.3TB of original raw's on it and my catalogue is built on those files.
Its very portable and takes away the need for an on location session, later to be brought into the catalogue.
Now things are getting busier I'll see what the limitations of this system are but currently, on a tethered shoot for a client, at the end of the shoot, I have two copies of the shoot, one in my pocket on a fast external SSD.
Steve