I started from scratch with the machine, and it’s now working so who knows what the issue was. It’s co-existing with netXMS perfectly happily now.
I do however have an issue with it backing up a Dell 9020 workstation, I think because of the recovery partition on the disk it keeps saying “invalid partition data!” when using the multi partition image type, but this is a totally separate issue. A block-by-block RAW copy works fine so the FOG program is working OK and the issue seems specific that that particular workstation. Annoying as it’s the one I was using for testing and it had me stumped for a little while thinking there was another problem with FOG when it was actually a problem with the workstation.
Thanks for the help.