N915T Write Cert Error


please help me here:

Checking certificate file… OK
KEY ID: 0208
Waiting ADB device… OK
Reading phone info…
Model: SM-N915T
Android version: 5.0.1
Product code: SM-N915TZWECOM
Phone version: N915TUBU1BOF1
PDA version: N915TUBS2BPF1
CSC version:
CSC country code: TRINIDAD AND TOBAGO
CSC sales code: TTT
HW version: REV1.0
Phone S/N: R1234567890
Modem board: MDM9225M
RF cal date: 2015.03.11
IMEI:
Initialization AT RIL… error
Done with Samsung Tool PRO v.25.9