I went and reinstalled SAPHOSTAGENT from scratch via Software Provisioning Manager.
That still did not do the trick.
But now I know which user/password combo "works" - sort of.
When I use sapadm with he Pwd I used during installation, I get passed the password popup dialog.
But then the browser presents me with an empty window, and the only text being displayed is:
"Document can not be found"
I can *not* log on as <sid>adm, no matter what I try.
Can someone here please at least confirm to me that:
1) SUM SP16+ needs to be started from /usr/sap/<SID>/SUM?
2) It needs to be started as user "root" (Linux)?
If I can't find another upgrade engine (is there really no "Upgrade Master DVD" for SCM5.0 -> SCM7 EHP3 ???),
and nobody helps me to get this dreaded new SUM running, then I need to open up a ticket with SAP - just to get SUM to start up right.
This is ludicrous, I already disliked the move to SUM in the first place, and now SAP requires dozens of other components to be configured/running, just to start the damn upgrade - not even to finish it successfully.