My Colour C-Touch has lost the ability to change the state of groups on the CBUS. \r\n\r\nThe system has been installed and 100% operational for 6 years. The last change that I made was in January. The fault appeared a couple of days ago.\r\n\r\nThe C-Touch accurately displays the state of everything and the screens update accurately and without delay when another input unit changes the state of a group on the CBUS. \r\n\r\nAfter a re-boot or firmware or program download the very first command works (eg turn a light on from a button on a screen). After that, the same pushbutton changes state temporarily before changing back when it is refreshed by a read cycle when it updates itself with the current state of the group. \r\n\r\nI have tried rebooting, reloading the application and reloading the firmware. I have confirmed that the logic engine and scheduler is running.\r\n\r\nI cycled power on the wiser unit that is on the same network just in case this was doing something unusual but this has not had any impact. The Wiser is operating ok.\r\n\r\nI have also re-booted the entire system (dropped power to the house for a couple of minutes)\r\n\r\nFirmware in the C-touch is up to date.