User`s guide

Remarks
If you have named a storage location (see MEMory:STATe:NAME
command), deleting the contents of a storage location will reset the
associated name to its factory default ("POWER_DOWN", "STATE_1",
"STATE_2", "STATE_3", and "STATE_4").
Although you may delete the state of location 0, it will be restored to its
factory default state, and its state name ("POWER_DOWN") at the next
power up.
Note that you cannot recall the instrument state from a storage location
that was deleted. An error is generated if you attempt to recall a deleted
state.