During system shutdown, the following messages may be received:
TSS7100E 012 J=POWSTART A=DUMMY T=N/A F=BATCH - End of Day TSS7181E End of Day - No Further System Access Allowed 0S02I A CANCEL OR CANCEL ALL MACRO WAS ISSUED
To avoid these messages POWER should be shutdown before CA Top Secret.
CA Top Secret should not be under the control of POWER.
If CA Top Secret is not under the control of POWER, you will be able to first shutdown POWER and shutdown CA Top Secret afterwards.