Can't uploading sketch by native usb on Arduino Zero

Using Arduino Programming Questions
1

During uploading the sample sketch named blink, there is a error of "SAM-BA operation failed". the log is following.

Arduino:1.6.13 (Windows 7), board："Arduino/Genuino Zero (Native USB Port)"

Atmel SMART device 0x10010005 found
Device : ATSAMD21G18A
Chip ID : 10010005
Version : v2.0 [Arduino:XYZ] Sep 22 2016 19:06:39
Address : 8192
Pages : 3968
Page Size : 64 bytes
Total Size : 248KB
Planes : 1
Lock Regions : 16
Locked : none
Security : false
Boot Flash : true
BOD : true
BOR : true
Arduino : FAST_CHIP_ERASE
Arduino : FAST_MULTI_PAGE_WRITE
Arduino : CAN_CHECKSUM_MEMORY_BUFFER
Erase flash
done in 0.818 seconds

Write 9696 bytes to flash (152 pages)

[============ ] 42% (64/152 pages)
[========================= ] 84% (128/152 pages)
[==============================] 100% (152/152 pages)
SAM-BA operation failed

done in 0.081 seconds

Verify 9696 bytes of flash with checksum.
Verify successful
done in 0.015 seconds
CPU reset.

what happened?

2

did you directly load the sketch from examples?

3

As I asked in your other thread, why do you suppose the Zero (and the Due) have two USB ports, with one of them labeled Programming? It is NOT there to tie up space on the board.

It IS there for Programming the board!