NOTICE Messages

Im using freepbx From the distro, I have a 4 port ISDN2 card and all seems to be working fine but at the asterisk cli I get the following repeatedly even when there is no call activity.

== Spawn extension (tc-maint, s, 4) exited non-zero on ‘Local/s@tc-maint-f423;2’
[2012-05-05 20:26:00] NOTICE[4101]: pbx_spool.c:353 attempt_thread: Call failed to go through, reason (1) Hangup
[2012-05-05 20:26:00] NOTICE[4101]: pbx_spool.c:356 attempt_thread: Queued call to Local/s@tc-maint expired without completion after 0 attempts
– Attempting call on Local/s@tc-maint for application Noop(Time Conditions Override Maintenance Script) (Retry 1)
– Executing [s@tc-maint:1] Set(“Local/s@tc-maint-11ab;2”, “TCMAINT=RETURN”) in new stack
– Executing [s@tc-maint:2] GosubIf(“Local/s@tc-maint-11ab;2”, “0?timeconditions,1,1”) in new stack
– Executing [s@tc-maint:3] System(“Local/s@tc-maint-11ab;2”, “/var/lib/asterisk/bin/schedtc.php 60 /var/spool/asterisk/outgoing 0”) in new stack
– Executing [s@tc-maint:4] Hangup(“Local/s@tc-maint-11ab;2”, “”) in new stack

I’d apreciate any advice that anyone can offer.

Thanks Dave