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Article #10312: Opening TQuery results in Operation Not Applicable Error

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.

Last Modified: 19-OCT-99