IPLing MVS 3.8J on non-00 LPAR CP

I've recently acquired a z890 on the secondary market and while I figure out how to power it up I'm using HERCULES (3.07) to familiarize myself with what my software options would be.

In the .cnf file I have defined the following:

...
ARCHMODE  z/Arch
CPUSERIAL 000611
CPUMODEL  2086
LPARNAME  HERCULES
MAINSIZE  512
XPNDSIZE  0
CNSLPORT  3270
NUMCPU    5
MAXCPU    5
ENGINES   CP,AP,IP
LOADPARM  31428671
...

Hercules correctly refuses to IPL from CPU 01 and 02.  I can IPL ZZSA from CPU 00, 03 and 04.

I can IPL MVS 3.8J from CPU 00.

I can *not* IPL MVS 3.8J from CPU 03, 04.  The HERCULES console gives me the following when I try.

...
ipl 0150
HHCCP011I CPU0003: Disabled wait state
          PSW=00020000 80000001
...

That looks serious but I can't get a lock on it with z/OS docu.

Does this PSW ring a bell with anyone?

TIA

Chuck