Question: kernelopts datalimit error

Error

can not raise the datalimit above hard limit

 

my new notebook has 32GB memory

kernelopts(datalimit=28*unit(gibibtye)):

do i need to assign datalimit with kernelopts?

and

I remember i set a trick to protected this file

now I can read and run 

but return above error

does it mean that I do not need to set limit?

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