In the morining I found the notification showing that the rogue system sensor is missing and the last communication is 1/12/2011.
What can make this sensor being missed?
That means that the sensor has stopped communicating to the ePO Server (tomcat). You can go to the "missing" sensor machine and get a copy of the RSsensor_out.log to see what the communication failures are.
Thank you for your intervention. The attached is RSDSensor_out.log on the last communication date. The x.x.x.x:9444 stands for the address of the "missing" sensor machine.