Initialization AT RIL… error Problem…

I been having this issue since yesterday…

Tried rebooting windows, downgrading z3x samsung pro, unistall and reinstall…. What can the problem be?

Here are some examples…

Operation: Write CERT
Selected model: SM-N900T
Selected port: COM90 SAMSUNG Mobile USB Serial Port
Software version: 24.1

Checking certificate file… OK
KEY ID: 0813
Waiting ADB device… OK
Reading phone info…
Model: SM-N900T
Android version: 4.3
Product code: SM2N900TZKETMB
Phone version: N900TUVUCNB4
PDA version: N900TUVUBMI7
CSC version: N900TTMBBMI7
CSC country code: USA
CSC sales code: TMB
HW version: REV0.6
Phone S/N: RV8F107LHXE
Modem board: MSM8974
RF cal date: 2014.01.09
IMEI: 357518054589973
Initialization AT RIL… error

Done with Samsung Tool PRO v.24.1

Really Note 3 imei repair after MSL lol now… next

[ 2/24/2016 10:26:00 PM ] Operation: Write CERT
[ 2/24/2016 10:26:00 PM ] Selected model: SM-G925T
[ 2/24/2016 10:26:00 PM ] Software version: 24.3
[ 2/24/2016 10:26:00 PM ]
[ 2/24/2016 10:26:00 PM ] Waiting ADB device… OK
[ 2/24/2016 10:26:00 PM ] Reading phone info…
[ 2/24/2016 10:26:00 PM ] Model: SM-G925T
[ 2/24/2016 10:26:00 PM ] Android version: 5.1.1
[ 2/24/2016 10:26:00 PM ] Product code: SM-G925TZWATMB
[ 2/24/2016 10:26:00 PM ] Phone version: G925TUVS3DOJC
[ 2/24/2016 10:26:00 PM ] PDA version: G925TUVS3DOJC
[ 2/24/2016 10:26:00 PM ] CSC version: G925TTMB3DOJC
[ 2/24/2016 10:26:00 PM ] CSC country code: USA
[ 2/24/2016 10:26:00 PM ] CSC sales code: TMB
[ 2/24/2016 10:26:00 PM ] HW version: REV0.2
[ 2/24/2016 10:26:00 PM ] Phone S/N: R58G50VXA8L
[ 2/24/2016 10:26:00 PM ] Modem board: SHANNON333
[ 2/24/2016 10:26:00 PM ] RF cal date: 20150520
[ 2/24/2016 10:26:00 PM ] IMEI:
[ 2/24/2016 10:26:00 PM ] Checking Super user right… true
[ 2/24/2016 10:26:00 PM ] Initialization AT RIL… OK
[ 2/24/2016 10:26:00 PM ] Checking certificate file… OK
[ 2/24/2016 10:26:00 PM ] KEY ID: 0346
[ 2/24/2016 10:26:00 PM ] Check version… OK
[ 2/24/2016 10:26:00 PM ] Initializating zTool… error (0)

So please what can the problem be??

PS> Unlocking works…. MSL Reset, Sprint Unlocks works…. just IMEI Repairing not working getting error Initializating ZTool… Error (0)

Thanks!

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