DA14531 CLI Flashing

Hi there,

I have few question about flashing binary file into DA14531.

1) when I am  executing (.\SmartSnippetsToolbox.exe -type spi -chip DA14531 -clk P0_4 -cs P0_1 -miso P0_3 -mosi P0_0 -jtag 483052626 -cmd write -offset 0x0000 -file "image_14.bin" -max 0x400000 -firmware "jtag_programmer.bin") this command, It is asking the below question, but flashing is happening fine. Can anyone tell me the meaning of bootable here? 

Do you want SPI Flash memory to be bootable? ([Y / N]?)
N

2) when I am trying to erase the DA14531 flash using (.\SmartSnippetsToolbox.exe -type spi -chip DA14531-01 -clk P0_4 -cs P0_1 -miso P0_3 -mosi P0_0 -jtag 483052626 -cmd erase -verify) this command, I am getting Failed configuring SPI ports and pins. Can anyone tell me how to resolve this erase issue?

Launching SmartSnippets Toolbox v5.0.24.4128
Loaded the following properties from C:\Users\vigneshv\SmartSnippetsToolbox\properties.txt
{ENABLE_HIDDEN_TOOLS=true, ENABLE_TS=true, ENABLE_MP=true, ENABLE_TE=true}
Command line arguments:
-type spi -chip DA14531-01 -clk P0_4 -cs P0_1 -miso P0_3 -mosi P0_0 -jtag 483052626 -cmd erase
Found SW-DP with ID 0x0BC11477
DPIDR: 0x0BC11477
Scanning AP map to find all available APs
AP[1]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x04770031)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410CC601. Implementer code: 0x41 (ARM)
Found Cortex-M0 r0p1, Little endian.
FPUnit: 4 code (BP) slots and 0 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB008 SCS
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 000BB00A DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 000BB00B FPB
BTLE device selected.
Using default max memory size: 0x00200000 bytes.
Using default baudrate: 115200 Bd.
Failed configuring SPI ports and pins.
Started erasing all memory.
SPI Flash memory erasing failed.