How to shift the flash memory on KL25Z

Mbed OS
,
1

Hello, I work with Mbed Studio (mbed-os 5.15.7) on a KL25ZVLK4 chip.
For the needs of my project we decided not to go through a development platform but directly through the chip which led us to include a Bootloader via MCU Expresso. This bootloader takes some space in the flash memory and so it is necessary to shift the origin of the flash memory for the application to start (Application Test: mbed-os-example-blinky-5 )
I compile under ARMC6 and I modified the file : /c:/…/mbed-os/targets/TARGET_Freescale/TARGET_KLXX/TARGET_KL25Z/device/TOOLCHAIN_ARM_STD/MKL25Z4.sct
(Original)

#! armcc -E

#if !defined(MBED_BOOT_STACK_SIZE)
  #define MBED_BOOT_STACK_SIZE 0x400
#endif

#define Stack_Size MBED_BOOT_STACK_SIZE

LR_IROM1 0x00000000 0x20000  {    ; load region size_region (32k)
  ER_IROM1 0x00000000 0x20000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
  }

  ; 8_byte_aligned(48 vect * 4 bytes) =  8_byte_aligned(0xC0) = 0xC0
  ; 0x4000 - 0xC0 = 0x3F40
  RW_IRAM1 0x1FFFF0C0 0x3F40 {
   .ANY (+RW +ZI)
  }
  
  ARM_LIB_HEAP AlignExpr(+0, 16) EMPTY (0x1FFFF000+0x4000-Stack_Size-AlignExpr(ImageLimit(RW_IRAM1), 16)) { ; Heap region growing up
  }

  ARM_LIB_STACK 0x1FFFF000+0x4000 EMPTY -Stack_Size { ; Stack region growing down
  }
}

it compiles, so the output is:

Origine
Origine1267×819 106 KB

I then modify it like this:

#! armcc -E

#if !defined(MBED_BOOT_STACK_SIZE)
  #define MBED_BOOT_STACK_SIZE 0x400
#endif

#define Stack_Size MBED_BOOT_STACK_SIZE

LR_IROM1 0x00007000 0x20000  {    ; load region size_region (32k)
  ER_IROM1 0x00007000 0x20000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
  }

  ; 8_byte_aligned(48 vect * 4 bytes) =  8_byte_aligned(0xC0) = 0xC0
  ; 0x4000 - 0xC0 = 0x3F40
  RW_IRAM1 0x1FFFF0C0 0x3F40 {
   .ANY (+RW +ZI)
  }
  
  ARM_LIB_HEAP AlignExpr(+0, 16) EMPTY (0x1FFFF000+0x4000-Stack_Size-AlignExpr(ImageLimit(RW_IRAM1), 16)) { ; Heap region growing up
  }

  ARM_LIB_STACK 0x1FFFF000+0x4000 EMPTY -Stack_Size { ; Stack region growing down
  }
}

The program compiles but at the output (In the Build folder) the binary file becomes a folder like this:

Offset
Offset1278×742 99.3 KB

It is thus unusable

How can I shift the flash memory starting point correctly?

Your help will be very appreciated
Thank you in advance, Sincerely Antoine