Hi, Have got this message when I try to build my sample project, blinky. Well, I have bought a full licensed CA51 V7.0, installed it with an online registration completed, and still I got this message at the bottom. Any ideas guys? Regards, JM Build target 'Simulator' compiling Blinky.c... BLINKY.C(1): warning C500: MISSING DEVICE (SECURITY KEY NOT FOUND) assembling START900.A51... linking... BL51 BANKED LINKER/LOCATER V5.03 - SN: C1D6P-58164E COPYRIGHT KEIL ELEKTRONIK GmbH 1987 - 2002 "Blinky.obj", "START900.obj" TO "Blinky" RAMSIZE(256) *** FATAL ERROR L210: I/O ERROR ON INPUT FILE: EXCEPTION 0021H: PATH OR FILE NOT FOUND FILE: Blinky.obj Target not created