My EISY has stopped controlling one of my 6-button wall switches. The local load is the one that I am using for a reading lamp by a chair and although the thing is programmed into the EISY (brought over from ISY) it does not seem to be seen by the EISY. Light state does not show up and EISY cannot control it.

Any suggestions for first step next for troubleshooting?

Thanks and Merry Christmas!

The first step might be to try a "restore device" (right click on the switch in Admin Console to see that option). That should rewrite the links between it and the PLM. If that doesn't work, then the next step might be a factory reset of the switch and then relinking it to the controller.