Thomas,
Reading is what I would try first. Then writing something simple. If they
are not responding, I'll guess they might only need a reset and then restore
the addresses. Then dump the saved roster file to the board. You did save
the roster entry when you programmed the board originally?
GPON referrers to the 'global power on' and it is a set of messages asking
all turnouts and sensors to report their current state during the power on
of the command station.
-Ken Cameron, Member JMRI Dev Team
www.jmri.org
www.fingerlakeslivesteamers.org
www.cnymod.com
www.syracusemodelrr.org
Ken Cameron