Z3X cannot choose detected COM?


shell detected COM16, but i cannot choose COM16 from shell.
I just updated to newest shell.
Please advise.

Selected model: I537
Selected port: COM15 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Searching Samsung modem… detected COM16
Reading phone info…
Software version:
IMEI:
Product code:
Done with Samsung Tool v.18.2

Selected model: I537
Selected port: COM15 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Searching Samsung modem… detected COM16
Reading phone info…
Software version:
IMEI:
Product code:
Done with Samsung Tool v.18.2

Selected model: I537
Selected port: COM10 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Searching Samsung modem… detected COM16
Reading phone info…
Software version:
IMEI:
Product code:
Done with Samsung Tool v.18.2

Selected model: I537
Selected port: COM15 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Searching Samsung modem… detected COM16
Reading phone info…
Software version:
IMEI:
Product code:
Done with Samsung Tool v.18.2

Selected model: I537
Selected port: COM10 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Searching Samsung modem… detected COM16
Reading phone info…
Software version:
IMEI:
Product code:
Done with Samsung Tool v.18.2

Selected model: I537
Selected port: COM17 USB Serial Port
Selected port speed: 115200
Searching Samsung modem… detected COM16
Reading phone info…
Software version:
IMEI:
Product code:
Done with Samsung Tool v.18.2