HP 53181A Programming Manual page 292

Errors
Error Types
-420 Query UNTERMINATED
-430 Query DEADLOCKED
-440 Query UNTERMINATED
after indefinite response
+2000 Offset calibration on channel 1 failed
+2002 Gain calibration on channel 1 failed
+2004 Interpolator calibration failed
+2005 Oscillator calibration failed
+2007 Measurement hardware calibration failed
+2008 Measurement interpolator calibration failed
+2009 No valid external timebase
+2010 External timebase failed during
measurement
+2011 Recall setup failed; hardware failure
Recall setup failed; empty register
+2012 Save setup failed
+2013 EEPROM failed
5-10
Indicates that a condition causing an UNTERMINATED Query error
occurred. For example, the Counter was addressed to talk and an incomplete
program message was received.
Indicates that a condition causing a DEADLOCKED Query error occurred.
For example, both input buffer and output buffer are full and the Counter
cannot continue.
Indicates that a query was received in the same program message after a
query requesting an indefinite response ( for example, *IDN? or *OPT?) was
executed.
:DIAGnostic:CALibration:INP:OFFS:AUTO ONCE failed.
:DIAGnostic:CALibration:INP:GAIN:AUTO ONCE failed.
:DIAGnostic:CALibration:INTerpolator:AUTO ONCE, *CAL?, or
:CALibration[:ALL]? failed.
:DIAGnostic:CALibration:ROSCillator:AUTO ONCE failed.
A measurement calibration failed on the last measurement.
Interpolator calibration failed on the last measurement; therefore, no valid
measurement was taken.
You have selected external reference and there is no external reference
applied to the rear-panel Ref In connector, or the external signal is not an
allowed frequency.
You have selected the auto reference mode and the Counter detected that
the external reference became invalid during the measurement. Therefore,
the current result is not valid, and the Counter switches to using the internal
reference.
*RCL failed.
*RCL failed because the register specified for recall is empty.
*SAV failed, or *RCL couldn't save to register 0.
A request to update a setting which is stored in the EEPROM
(:SYST:COMM:SER:TRAN:BAUD, :SYST:COMM:SER:TRAN:PAR,
:SYST:COMM:SER:TRAN:PACE, :SYST:COMM:SER:CONT:DTR,
:DISP[:WIND]:TEXT:RAD, :CAL[:DATA], or :DIAG:CAL: ...) resulted in a
hardware failure.