Good Day
My question is how do I know what the name of the running SAP Kernel lib is?
I am sorry I don't understand your question.
Everything that is put in the DIR_CT_RUN location is used by SAP.
So in the past we would rename the SAP Kernel during the upgrade and exactly know what the lib name is, now the SUM tool runs and that’s that.
What do you mean by : "know what the lib name is" ?
SUM is not doing anything special in replacing the kernel. During an upgrade it just replaces the present kernel with the target release/version kernel.
Regards
RB