Fixlet ID 5148 - Install Bigfix Relay on Linux and UNIX (version 10.0.7) is not relevant for AIX 7.3. I cannot I install the relay service on AIX 7.3?
Apparently that’s intentional, looks like Relay support for AIX was dropped for 7.3. Per the support matrix linked here we provide Agent but not Relay (though we had Relay for AIX 7.1 and 7.2 )
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0087327#aix
Isn’t AIX a common platform? I wonder why HCL would drop relay support for it?
During an symposium it looked like I was the only one running relay on AIX 
However, maybe just do necessary adaptions in the fixlet and check if it works?