The ERRor query returns the oldest error number from the error queue.
A complete list of error numbers for the HP 1652B/53B is shown in
appendix C, "Error Messages." If no errors are present in the error queue,
a zero is returned.
Query Syntax:
Returned Format:
Example:
20 ENTER XXX;Err-num
30 PRINT Err-num
40 END
HP
System Commands
621