User`s guide

Description
This command reads and clears one error from the instrument's error queue.
A record of up to 20 errors can be stored in the instrument's error queue.
Each remote interface I/O session (i.e., GPIB, USB, LAN, etc.) has its own
error queue. Errors appear in the error queue of the I/O session that caused
the error. For example, if an error was generated by a command sent over
the GPIB interface, send the SYSTem:ERRor? command from GPIB to read
the error queue.
For a complete listing of the Agilent 34410A/11A/L4411A's error messages,
see SCPI Error Messages.