System:error[:Next] - Keysight 8990B Programming Manual

SYSTem:ERRor[:NEXT]?

This query returns the next error number and its corresponding error message
from the error queue. When an error is generated by the 8990B, it stores an error
number and its corresponding message in the error queue. One error is removed
from the error queue each time this query is sent. The errors are cleared in the
first-in first-out (FIFO) order, where the oldest errors are cleared first. When the
error queue is empty, subsequent SYSTem:ERRor? queries will return 0,"No
error".
Syntax
Example
SYST:ERR?
Remark
To clear all errors from the error queue, send the *CLS command.
Reset condition
On reset, the error queue is unaffected.
Keysight 8990B Programming Guide
SYST
:ERR
Queries the oldest error message stored in the 8990B error
queue.
?
:NEXT
SYSTem Subsystem 22
531