S4 minu
 

Hi
I am experiencing problems unlocking many Samsungs recently. the latest is this one:
Chimera Mobile Phone Utility version: 12.47.1902 @ 2017-01-01

Printing phone history

Unlock
28/12/2016
15:54:25



[Unlock phone started]

Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: GT-I9195
Sales Code: O2U
Country Code: UK & IRE
Timezone: Europe/London
Android Version: 4.4.2 [KOT49H]
Build Date: Fri Dec 18 14:26:08 KST 2015
PDA Version: I9195XXUCOL3 [december 2015, rev3]
Phone Version: I9195XXUCOL3 [december 2015, rev3]
CSC Version: I9195O2UCOL1 [december 2015, rev1]
Product Code: GT-I9195ZKAO2U
HIDSw Version: I9195XXUCOL3/I9195O2UCOL1/I9195XXUCOL3/I9195XXUCOL3
Board Platform: MSM8960
Modem Platform: MSM8930AB
Serial Number: RF8F80YC5AH
Imei: 354899067592854
Unique Number: C089002A7B95871
Connections: AT,MTP
Battery Status: 4.26V (88%)
Network Type: GSM
SIM Status: ABSENT
Knox Version: v30
Warranty Bit: 0
Security Patch: 2015-12-01

Checking root state...
Not rooted.
There is no backup, because there is no root access.

Unlocking...
Trying on SAMSUNG Mobile USB Serial Port (COM7)
Protocol error.
Trying on SAMSUNG Mobile USB Serial Port (COM7)
Protocol error.
Trying on SAMSUNG Mobile USB Serial Port (COM7)
Protocol error.
Unable to unlock.
Finished at local time: [01.01.17 11:56:55]
WorkID: 16544409

I have been getting very similiar results with S5 models as well. Have I missed something or is their a problem with my set up?
any help/advice/explanation welcome
Thank you
Steve

SORRY POSTED IN WRONG SECTION IN ERROR
CAN I DELETE?
Thank yiou
Steve