Keysight Technologies EPM-P Series Programming Manual page 324

7 MEMory Subsystem
– If a table has not been specified using the MEMory:TABLe:SELect command,
– If a frequency is sent which is outside of the allowed frequency range, error
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the data cannot be entered into the table and error -221, "Settings conflict"
occurs.
-222, "Data out of range" occurs.
Keysight EPM-P Series Programming Guide