Agilent Technologies Infiniium 8000A, Programmer'S Reference Manual

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System Commands
ERRor?
ERRor?
Query :SYSTem:ERRor? [{NUMBer | STRing}]
The :SYSTem:ERRor? query outputs the next error number in the error queue
over the GPIB. When either NUMBer or no parameter is specified in the query,
only the numeric error code is output. When STRing is specified, the error
number is output followed by a comma and a quoted string describing the error.
Table 30-1 lists the error numbers and their corresponding error messages.
Returned Format
[:SYSTem:ERRor] <error_number>[,<quoted_string>]<NL>
<error_number> A numeric error code.
<quoted_string>
A quoted string describing the error.
Example
This example reads the oldest error number and message in the error queue
into the string variable, Condition$, then prints the contents of the variable to
the computer's screen.
10 DIM Condition$[64]!Dimension variable
20 OUTPUT 707;":SYSTEM:ERROR? STRING"
30 ENTER 707;Condition$
40 PRINT Condition$
50 END
Infiniium Oscilloscopes have an error queue that is 30 errors deep and operates
on a first-in, first-out (FIFO) basis. Successively sending the :SYSTem:ERRor?
query returns the error numbers in the order that they occurred until the queue
is empty. When the queue is empty, this query returns headers of 0, “No error.”
Any further queries return zeros until another error occurs. Note that front-
panel generated errors are also inserted in the error queue and the Event Status
Register.
See Also The “Error Messages” chapter for more information on error messages and their
possible causes.
Send *CLS Before Other Commands or Queries
Send the *CLS common command to clear the error queue and Event Status Register
before you send any other commands or queries.