When arming to any mode, away, night, day the arming does not complete, although no zones are announced.
This may be due to the Tamper Input left open, but Nondetector Alarm for Tamper has been assigned to Null Alarm instead of Tamper Alarm Type.
When the Tamper Nondetector Alarm is set to Null, it means that when tamper occurs, it does not cause a Tamper Alarm Type, but is ignored. However Comfort does detect Tamper but does not announce it, but does not allow the system to arm - thus the arming does not complete
This probably happened because the installer did not want to connect the Tamper Input, but instead dxecided to disable the Tamper alarm in Nindetector allarms. The result is the system cannot be armed.
The next firmware (after 7.117) will fix this so that if Nondetector Alarm for Tamper is Null, the system can be armed