Hello, I'm using a Virtual Machine (VMare Player), in which I run TW WinXp. In this environment I work with Eclipse. When I press on the button "Build", here is the message I get: **** Build of configuration Debug for project Carbone_A1 **** cs-make all 'Building file: ../main.c' 'Invoking: ARM Sourcery Windows GCC C Compiler' arm-none-eabi-gcc -I"C:\workspace\Carbone_A1\Libraries" -I"C:\workspace\Carbone_A1\Libraries\inc" -I"C:\workspace\Carbone_A1\Libraries\src" -O0 -pedantic -Wall -fsigned-char -c -fmessage-length=0 -MMD -MP -MF"main.d" -MT"main.d" -mcpu=cortex-m3 -g3 -gdwarf-2 -o"main.o" "../main.c" ../main.c:1: error: target CPU does not support ARM mode cs-make: *** [main.o] Error 1 I don't really know from where this error comes out. I'd like to kindly ask if you could help me solving this issue. Maybe the “main.c” file I have is wrong. When I "drop and drag" the main.c to the project, I noticed that the icons under it, init.h and irq.q, have a yellow exclamation mark warning sign (before debugging it). However, this is its content: #include "init.h" #include "irq.h" int main(void) { systemInit(); init_VIC(); for(;;) { } } Thank you very much.