@jay_s_uk Hi, I had a look at machine setting and it showed that the Mini5 had 3.5.6, but the Roto had 3.5.4, so I went to GitHub and down loaded release 3.5.4 and uploaded it and now when I send M119 the report comes back
"Endstops - X:at min stop, Y:at min stop. Z:at min stop, Z probe:at min stop.
Thank you for your help, it wouldn't have occurred to me that different firmware versions could cause such a problem, but it does seem odd to me that it was only the endstops that wouldn't work.
Cheers
Stephen