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MOPZ/Maintenance Planner - Only unicode kernel options offered

In Maintenance Optimizer (Solman 7.1 sp10) (also in Maintenance Planner), I am planning maintenance for a Stack upgrade to our ECC systems.

The current systems are

     ECC 6.0 Ehp7 Stack 7 using Non-Unicode Kernel 7.42 sp 200

The desired target is

     ECC 6.0 Ehp7 Stack 9 using the current 7.42 or 7.5 Non-Unicode Kernel.

I understand that an upgrade to Ehp8 would incur a unicode migration.  Management has determined that a unicode migration will be delayed to coincide with a upgrade to HANA starting in 2017.  In the meantime, management desires to apply the minimum maintenance required to meet the prerequisite requirements for year-end HR support packs.

Not to my problem.  When I use either MOPZ or Maintenance Planner to create a maintenance transaction, the only kernel options offered are unicode.

Is this in err, and is there anything I can do to influence the choices presented.

Also, are there implications to selecting no kernel file, and manually upgrading the kernel outside of the SUM process.

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