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How to flash with JLink command line

I have set up the gcc toolchain on Mac OSX to compile my BLE nRF51822 code and I tried to flash the code. Here are the 3 scenarios that I have tried (JlinkExe on Mac)

Case 1 : code compiled with Keil on Windows, is flashed (bootloader + softdevice + app), all works well. The memory is then read from flash with Windows in 1 hex. I flash it with Mac, it works

Case 2 : I flash with my Mac the softdevice.hex (from case 1) then app.hex (from case 1). It doesn't work

Case 3 : same as case 2 but app.hex comes from compiled code from mac, not from windows

Here is my script :

device nrf51
speed 1000
w4 4001e504 2
w4 4001e50c 1
sleep 100 
r
# case 1   : OK
# loadbin soft_device_bootloader_app.hex 0x0

# case 2   : FAIL
# loadbin s110_nrf51822_7.0.0_softdevice.hex 0x0 
# loadbin app_windows.hex 0x16000

# case 3   : FAIL
# loadbin s110_nrf51822_7.0.0_softdevice.hex 0x0 
# loadbin app_mac.hex 0x16000
sleep 100 
r
g
exit

Note : this is soft device S110, 7.0.0. Thanks!

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