Agilent Technologies N8900 series Operating Manual page 115

SCPI Error Messages
The version of the data format is incorrect to the instrument.
-240 Hardware error
The command could not be executed because of a hardware problem with the instrument.
-241 Hardware missing
The command could not be executed because of missing hardware, such as an option.
Query Errors (these errors set Standard Event Status register bit #2)
-400 Query Error
Generic error query
-410 Query INTERRUPTED
A condition causing an interrupted query error occurred.
-420 Query UNTERMINATED
A condition causing an unterminated query error occurred.
-430 Query DEADLOCKED
A condition causing a deadlocked query error occurred.
-440 Query UNTERMINATED after indefinite response
A query was received in the same program message after a query indicating an indefinite response was executed.
114 Agilent N8900 Series Operating and Service Guide