Dave,
I understand your suspicion. Believe me, I was scratching my head as it just did not make sense. Especially since the other screen sets worked as expected.
Last night I gutted the probe by removing the resister and LED. I tested after gutting the probe and there was no change and getting the surface not found message which didn't make sense. From what I've read, that seems to cure the issue with most folks.
I got home tonight and decide to disable all input pins, closed mach. Restarted and enabled the input pins, closed mach. Set the PDMX-126 as I've always run it, as I changed to jumbo mode to use a different pin which is tied to pin 15 as indicated for a 2 probe/touch plate etc configuration. So, everything is back to my normal configuration as when I started to probe with msm.
Well, it is now working as expected and I can stop scratching my head
