Thanks Suma,
My settings (ccckeepalive = 1)
as below have not been changed in the last 12 months....did not seem to be causing a problem up till now...confusing me.
device = server_258,XXX01
user = ******
password =******
inactivitytimeout = 30
group = 1
blockemm-unknown = 1
blockemm-u = 1
blockemm-s = 1
cccversion = 2.1.2
ccckeepalive = 1
[reader]
label = server_291
protocol = cccam
device = server_291,XXX01
user =*******
password ******
inactivitytimeout = 30
group = 1
blockemm-unknown = 1