Hi Byungmin,
I'd recommend you to use the latest version of S32DS for arm if possible:
S32 Design Studio for ARM 2018.R1 (Windows/Linux) released!
S32 Design Studio for ARM 2018.R1 - Update 1 available
It includes the updated version of P&E GDB server (v3.4.5).
In case you are connecting/debugging over OpenSDA please check if you have the latest firmware (v1.19).
If you don't have please update the firware:HOWTO: Update OpenSDA Firmware on EVB
If you are using Windows 10 it is highly recommended to download and install the latest drivers by P&E:

If it doesn't help please let us know the version of your S32K144 chip populated on the board.
Hope it helps.
Stan