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Chapter 5 Errors
Error Types
Query Error
An <error number> in the range [ 400 to 499] indicates that the output queue
control of the Counter has detected a problem with the message exchange protocol.
The occurrence of any error in this class should cause the query error bit (bit 2) in
the Event Status Register to be set. One of the following is true:
An attempt is being made to read data from the output queue when no output
is either present or pending.
Data in the output queue has been lost.
5-6
Programming Guide
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