This error is what circumstance

Building for ArduPilot Mega 2.x
Excluding arduino core from include paths
C:\Program Files\ArduPilot-Arduino-1.0.3-windows\hardware\tools\avr\bin\avr-g++ -c -g -Os -Wall -fno-exceptions -ffunction-sections -fdata-sections -mmcu=atmega2560 -DF_CPU=16000000L -MMD -DUSB_VID=null -DUSB_PID=null -DARDUINO=103 -mcall-prologues -DCONFIG_HAL_BOARD=HAL_BOARD_APM2 -DEXCLUDECORE -IC:\GIT\ardupilot\libraries\AP_Common -IC:\GIT\ardupilot\libraries\AP_HAL -IC:\GIT\ardupilot\libraries\AP_Menu -IC:\GIT\ardupilot\libraries\AP_Param -IC:\GIT\ardupilot\libraries\AP_GPS -IC:\GIT\ardupilot\libraries\AP_Baro -IC:\GIT\ardupilot\libraries\AP_Compass -IC:\GIT\ardupilot\libraries\AP_Math -IC:\GIT\ardupilot\libraries\AP_InertialSensor -IC:\GIT\ardupilot\libraries\AP_AHRS -IC:\GIT\ardupilot\libraries\PID -IC:\GIT\ardupilot\libraries\RC_Channel -IC:\GIT\ardupilot\libraries\AP_RangeFinder -IC:\GIT\ardupilot\libraries\Filter -IC:\GIT\ardupilot\libraries\AP_Buffer -IC:\GIT\ardupilot\libraries\AP_Relay -IC:\GIT\ardupilot\libraries\AP_Camera -IC:\GIT\ardupilot\libraries\AP_Airspeed -IC:\GIT\ardupilot\libraries\APM_Control -IC:\GIT\ardupilot\libraries\GCS_MAVLink -IC:\GIT\ardupilot\libraries\AP_Mount -IC:\GIT\ardupilot\libraries\AP_Declination -IC:\GIT\ardupilot\libraries\SITL -IC:\GIT\ardupilot\libraries\AP_Navigation -IC:\GIT\ardupilot\libraries\AP_L1_Control -IC:\GIT\ardupilot\libraries\AP_HAL_Empty C:\Users\Administrator\AppData\Local\Temp\build7980794700844404777.tmp\ArduPlane.cpp -o C:\Users\Administrator\AppData\Local\Temp\build7980794700844404777.tmp\ArduPlane.cpp.o
In file included from ArduPlane.pde:26:0:
C:\GIT\ardupilot\libraries\AP_Common/AP_Common.h:118:5: warning: identifier ‘static_assert’ is a keyword in C++11 [-Wc++0x-compat]
static_assert(s_size == t, “wrong size”);
^
ArduPlane.pde:27:24: fatal error: AP_Progmem.h: No such file or directory
compilation terminated.
I have been in accordance with the instructions to do, but still won’t do
Why???

There is a whitespace in the path. Are you sure that is OK ???