HP 8163A Series Programming Manual page 176

Error Codes
Error
New/Old/Standard Number String
New -342
Standard -350
-400 to -499 Query Errors
Standard -400
Standard -410
Standard -420
Standard -430
Standard -440
176
"Printing error - offline"
"Queue overflow"
"Query error"
"Query INTERRUPTED"
"Query UNTERMINATED"
"Query DEADLOCKED"
"Query UNTERMINATED after indef resp"
Table 17 Overview for Supported Strings
HP 8163A Lightwave Multimeter, HP 8164A Lightwave Measurement System,
& HP 8166A Lightwave Multichannel System User's Guide, E1299
GPIB Error Strings