Even a simple led blinking project seems to show the problem. If I set the NV_FSEC_INIT @0x0000FF7FU = 0x7DU the application would not start after bdm removing and issueing a cpu reset. During flash programming a " device is secure. Erase to unsecure" message appear but then tha application would not start at all. It seems the flash is secured prior to dco trimming and flash updating......