HP 8153A - Page 268

Query Errors
Query errors have codes in the range -499 to -400. they indicate that a problem
has been detected in the output queue. This could be
■ Trying to read from the queue when the queue is empty, or
■ Data lost from output queue.
The Query Error bit is set in the Event Status Register, see “*ESR?” in
Chapter 6.
-400 Query error.
-410 Query interrupted [query followed by a DAB or a GET before the
response was complete].
-420 Query unterminated [addressed to talk, incomplete program message
received].
-430 Query deadlocked [the input buffer and the output buffer are full;
cannot continue].
-440 Query unterminated after indefinite response [the indefinite response
is no the last request in the message unit].
1-8 Error Codes