The SEEK statement can be used as a Boolean function. You cannot use a SEEK statement inside another file I/O statement. When the statement fails, the value TRUE is returned. When the statement is successful, the value FALSE is returned. Specifically, the SEEK statement returns a value identical to that returned by the file attribute STATE. For more information, refer to the discussion of the STATE attribute in the File Attributes Programming Reference Manual.

The file designator must not reference a direct file or a direct switch file.

When the record number is less than one, the record pointer points at the first record.