why error ???
 

FLASH INSTRUCTIONS:
1. Choose correct flash file(s).
2. If you have PIT file chosen, then you must check 'Repartition' option.
3. Check flashing options if needed (Repartition, EFS clear, Boot update).
4. Power on the phone in download mode (turn off phone, press vol.down + home + power).
5. Connect the phone to PC with USB cable, install drivers if needed.
6. Press 'Flash' button.

Operation: Flash
Selected model: SM-J500H
Software version: 28.4

File analysis... OK
Total file size: 0x736BD9C8 (1846 Mb)
Searching USB Flash interface... COM34 detected
Setup connection... OK
Reading PIT from phone... error

Done with Samsung Tool PRO v.28.4