Hello Guys
I know it is the Arduino Forum and I am using a Adafruit Hardware ! :o
but I am using a Arduino Software so I think I am at the right place to search for help.
I am using the Adafruit Feather M0 Wifi and have the problem that every time I want to upload a sketch I get the error message.
SAM-BA operation failed
I hope you guys have the knowledge to help me.
Thank You 
Arduino: 1.8.2 (Windows 7), Board: "Adafruit Feather M0"
Sketch uses 38376 bytes (14%) of program storage space. Maximum is 262144 bytes.
Forcing reset using 1200bps open/close on port COM13
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
PORTS {COM1, COM13, } / {COM1, COM13, } => {}
Uploading using selected port: COM13
C:\Users\Elektronikwerkstatt\AppData\Local\Arduino15\packages\arduino\tools\bossac\1.7.0/bossac.exe -i -d --port=COM13 -U true -i -e -w -v C:\Users\ELEKTR~1\AppData\Local\Temp\arduino_build_128803/CheckWifi101FirmwareVersion.ino.bin -R
Set binary mode
readWord(addr=0)=0x20007ffc
readWord(addr=0xe000ed00)=0x410cc601
readWord(addr=0x41002018)=0x10010305
version()=v2.0 [Arduino:XYZ] Mar 5 2016 17:46:52
chipId=0x10010005
Connected at 921600 baud
readWord(addr=0)=0x20007ffc
readWord(addr=0xe000ed00)=0x410cc601
readWord(addr=0x41002018)=0x10010305
Atmel SMART device 0x10010005 found
write(addr=0x20004000,size=0x34)
writeWord(addr=0x20004030,value=0x10)
writeWord(addr=0x20004020,value=0x20008000)
Device : ATSAMD21G18A
readWord(addr=0)=0x20007ffc
readWord(addr=0xe000ed00)=0x410cc601
readWord(addr=0x41002018)=0x10010305
Chip ID : 10010005
version()=v2.0 [Arduino:XYZ] Mar 5 2016 17:46:52
Version : v2.0 [Arduino:XYZ] Mar 5 2016 17:46:52
Address : 8192
Pages : 3968
Page Size : 64 bytes
Total Size : 248KB
Planes : 1
Lock Regions : 16
Locked : readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
readWord(addr=0x41004020)=0xffff
none
readWord(addr=0x41004018)=0
Security : false
Boot Flash : true
readWord(addr=0x40000834)=0x7000a
BOD : true
readWord(addr=0x40000834)=0x7000a
BOR : true
Arduino : FAST_CHIP_ERASE
Arduino : FAST_MULTI_PAGE_WRITE
Arduino : CAN_CHECKSUM_MEMORY_BUFFER
Erase flash
chipErase(addr=0x2000)
done in 0.749 seconds
Write 38744 bytes to flash (606 pages)
write(addr=0x20005000,size=0x1000)
writeBuffer(scr_addr=0x20005000, dst_addr=0x2000, size=0x1000)
[=== ] 10% (64/606 pages)write(addr=0x20005000,size=0x1000)
writeBuffer(scr_addr=0x20005000, dst_addr=0x3000, size=0x1000)
[====== ] 21% (128/606 pages)write(addr=0x20005000,size=0x1000)
writeBuffer(scr_addr=0x20005000, dst_addr=0x4000, size=0x1000)
[========= ] 31% (192/606 pages)write(addr=0x20005000,size=0x1000)
writeBuffer(scr_addr=0x20005000, dst_addr=0x5000, size=0x1000)
[============ ] 42% (256/606 pages)write(addr=0x20005000,size=0x1000)
writeBuffer(scr_addr=0x20005000, dst_addr=0x6000, size=0x1000)
[=============== ] 52% (320/606 pages)write(addr=0x20005000,size=0x1000)
writeBuffer(scr_addr=0x20005000, dst_addr=0x7000, size=0x1000)
[=================== ] 63% (384/606 pages)write(addr=0x20005000,size=0x1000)
writeBuffer(scr_addr=0x20005000, dst_addr=0x8000, size=0x1000)
[====================== ] 73% (448/606 pages)write(addr=0x20005000,size=0x1000)
writeBuffer(scr_addr=0x20005000, dst_addr=0x9000, size=0x1000)
[========================= ] 84% (512/606 pages)write(addr=0x20005000,size=0x1000)
writeBuffer(scr_addr=0x20005000, dst_addr=0xa000, size=0x1000)
SAM-BA operation failed
An error occurred while uploading the sketch
[============================ ] 95% (576/606 pages)write(addr=0x20005000,size=0x780)
writeBuffer(scr_addr=0x20005000, dst_addr=0xb000, size=0x780)
[==============================] 100% (606/606 pages)
done in 0.283 seconds
Verify 38744 bytes of flash with checksum.
checksumBuffer(start_addr=0x2000, size=0x1000) = 3e36
checksumBuffer(start_addr=0x3000, size=0x1000) = fd06
checksumBuffer(start_addr=0x4000, size=0x1000) = ccc3
checksumBuffer(start_addr=0x5000, size=0x1000) = 2f67
checksumBuffer(start_addr=0x6000, size=0x1000) = 30ec
checksumBuffer(start_addr=0x7000, size=0x1000) = 48e4
checksumBuffer(start_addr=0x8000, size=0x1000) = 3dfc
checksumBuffer(start_addr=0x9000, size=0x1000) = f80e
checksumBuffer(start_addr=0xa000, size=0x1000) = b3e6
checksumBuffer(start_addr=0xb000, size=0x758) = c0b9
Verify successful
done in 0.049 seconds
CPU reset.
readWord(addr=0)=0x20007ffc
readWord(addr=0xe000ed00)=0x410cc601
readWord(addr=0x41002018)=0x10010305
writeWord(addr=0xe000ed0c,value=0x5fa0004)
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
i hope it helps