Using CSM 6.0, and trying to install r20 of the CA DB2 Tools, the creation of the USS directory fails with the following error:
MME0270S - Action completed with an error. Action: setuid Error code: 139 EDC5139I Operation not permitted. Reason code: 0xB880000 Info: setuid(0)
The CSM user's TSO userID did not have the authority to perform the setuid function.
This condition was corrected by adding the CSM user's TSO ID to RACF's:
CLASS = FACILITY
PROFILE = BPX.SUPERUSER