Does anyone know what this error message means?

Projects Programming
1 
Sketch uses 29716 bytes (11%) of program storage space. Maximum is 262144 bytes.
Atmel SMART device 0x10010005 found
Device       : ATSAMD21G18A
Chip ID      : 10010005
Version      : v2.0 [Arduino:XYZ] Oct 20 2016 15:20:47
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 0.835 seconds

Write 30020 bytes to flash (470 pages)

[====                          ] 13% (64/470 pages)
[========                      ] 27% (128/470 pages)
[============                  ] 40% (192/470 pages)
[================              ] 54% (256/470 pages)
[====================          ] 68% (320/470 pages)
[========================      ] 81% (384/470 pages)
[============================  ] 95% (448/470 pages)
[==============================] 100% (470/470 pages)
done in 0.206 seconds

Verify 30020 bytes of flash with checksum.
Verify successful
done in 0.025 seconds
CPU reset.
processing.app.SerialException: Error opening serial port '/dev/cu.usbmodemFA131'.
	at processing.app.Serial.<init>(Serial.java:125)
	at processing.app.Serial.<init>(Serial.java:66)
	at processing.app.SerialMonitor$3.<init>(SerialMonitor.java:93)
	at processing.app.SerialMonitor.open(SerialMonitor.java:93)
	at processing.app.AbstractMonitor.resume(AbstractMonitor.java:110)
	at processing.app.Editor.resumeOrCloseSerialMonitor(Editor.java:2240)
	at processing.app.Editor.access$2400(Editor.java:77)
	at processing.app.Editor$DefaultExportHandler.run(Editor.java:2218)
	at java.lang.Thread.run(Thread.java:745)
Caused by: jssc.SerialPortException: Port name - /dev/cu.usbmodemFA131; Method name - openPort(); Exception type - Port not found.
	at jssc.SerialPort.openPort(SerialPort.java:167)
	at processing.app.Serial.<init>(Serial.java:114)
	... 8 more
Error opening serial port '/dev/cu.usbmodemFA131'.
3

hmm no I don't think so. This happened after sketch upload and Arduino (mkr zero) would not work after this. Multiple computers would not recognize Arduino. after hitting the reset button multiple times to set it in perpetual boot loader mode I was able to upload new sketches and it seems to work.

5

thanks...

6

Also I didn't exactly leave it out, if you look at the error message is states the chip type...