TSS ADD(msca) UID(0)
to make the MSCA a superuser in Unix System Services(USS), but received the following error:
TSS0321E INVALID ACID TYPE FOR THIS UID/GID
To give the MSCA superuser authority issue a:
TSS PER(msca) IBMFAC(BPX.SUPERUSER) ACC(READ)
UID(0) is not allowed for the MSCA.
Please see the UID keyword in Chapter 'Using ADDTO/REMOVE' of the CA Top Secret Command Functions Guide where this is documented.