My PROCCTC job CTCTEST Abends with U2989 checking CTC connections and also generates a CTC0103E message.
The UCB address I specify when I issue the start command is 7160, I have no idea where 3FFF is coming from.
The MIM doc says
SMS is managing the device
Release : 12.5
Component : MIM
The device UCB address is being managed by SMS.
Excluding the device in the SMS definitions will correct the problem.