Sorry for the late feedback.I've tested all your suggestions in my sytem and
really appreciate your kind help.
Finally my personal conclusion is:For a data set named 'aaa.bbb',
first issue
LD ALL DA('aaa.bbb')
If you got message like 'no racf definition found',then you must issue
another command
LD ALL DA('aaa.bbb') GEN
If the result is the same,then finally you can say this data set is really
a
not-racf-protected one.
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