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Introduction
Error Messages
Query Error An error number in the range –400 to –499 indicates that the output queue control of the
instrument has detected a problem with the message exchange protocol. An occurrence of
any error in this class causes the query error bit (bit 2) in the event status register to be set.
An occurrence of an error also means 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.