G900a unlock faild! Help me

Hello z3x team and guys. I want to unlock G900a 6.0.1 version, but I have error. Look at
What can I do?

Operation: Unlock
Selected model: SM-G900A
Selected port: COM17 SAMSUNG Mobile USB Serial Port
Software version: 29.6

Reading phone info…
Reading IMEI… OK
IMEI: 353502062912710
Unlocking… error (02)

Done Along with Samsung Tool PRO v.29.6