Agilent 4155C/4156C SCPI Command Reference, Edition 1 5-7
SCPI Commands
:CALibration:ERRor?
:CALibration:ERRor? 
This command returns a list of the calibration error numbers for the specified 
calibration item.
A zero is returned if no errors are detected.
If more than seven errors are detected, only the first seven errors are returned.
Syntax  :CALibration:ERRor? test_number
Parameter 
Query response  error_list <newline><^END>
error_list is a comma-separated list of error numbers.
The data type of error_list is string response data, but does not contain double quote 
characters at the beginning and end of the string.
When no errors are detected, 0 is returned.
Example  OUTPUT @Hp4155;":CAL:ERR? 101" 
ENTER @Hp4155;A$
Parameter Type  Explanation 
test_number numeric item number of the calibration
111 : ALL Unit
100 : VSU1,2/VMU1,2
101 : SMU1
102 : SMU2
103 : SMU3
104 : SMU4
105 : SMU5
106 : SMU6
107 : PGU1,2
108 : GNDU
109 : ADC