When I open my TQuery, why am I getting an "Operation Not Applicable
Error" when my TQuery returns no records?
If you have Unidirectional set to True for your TQuery this error
will occur. If you think you may be in this condition, run a select count(*)
query to determine the number of records returned from your Query before
running the TQuery.
Note: in Delphi 2 and 3 this condition does not occur.