David's response led me back to my debugging roots.   
while comparing the 'env' output between the two systems.  There were some 
surprising differences.  
I don't know all the technical aspects of SHLVL  (shell level?) - but they did 
not match.   
After some Bing AI research that started to lead me down some deep technical 
details, I decided to fall back on the old tried and true system programmer 
games.
The most productive game is from Sesame Street -- "One of these things is not 
like the Other"

The shortest path was to merge the /etc/profile from my good system to the 
failing one.
I discovered much.   First, it's comments implied that it had not been touched 
since OS/390 and the 1990s
Other things were
   The if $STEPLIB logic that 'forces a respawn?' was different
   Two new environment exports were needed (_BPX_SHAREAS=YES and 
_BPX_SPAWN_SCRIPT=YES) 
   There were a few other minor things that I will leave out to avoid further 
embarrassment to myself.

Thanks to all that chipped in and led me back to my core debugging skills.   I 
had gone looking for Zebras when I head the sounds of hoofbeats.

I would also like to take this opportunity to apologize if I in any way caused 
this thread to spawn in the ugly directions that it has done.   Behave 
yourselves people....  It's all just ones and zeroes  not life and death.

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