incident event At the early morning on 16 April, 2015,we received call from the user that they were not able to perform X action on for one of A machine, the issue was raised to technical support team. User reported that the one of A machine are not been power off during the cleaning period, it may be the root causes of the abnormal of A machine. as the problem cannot being solved by technical support team, they had contacted vender for the support and the problem solved at about 10:30