Sometimes, the OleDb provider returns error when there are not. For example, lets take a look at this following line:

SELECT Master.Numero,Master.FirstName,Master.LastName,Master.Born,Master.Decease,Master.BornYear,Master.DeceaseYea,Master.NoSchool,
 Master.NoMaster,MasterType.Title_E,MasterType.Title_F,Master.WikiUrl_E,Master.WikiUrl_F,Master.WikiTitl_E,Master.WikiTitl_F,;
 IIF(ISNULL(MasterDefinition.Notes_E),"",MasterDefinition.Notes_E) AS Notes_E,;
 IIF(ISNULL(MasterDefinition.Notes_F),"",MasterDefinition.Notes_F) AS Notes_F,Master.Url;
 FROM Master;
 LEFT JOIN MasterDefinition ON Master.Numero=MasterDefinition.NoMaster AND MasterDefinition.NoMasterC=14;
 INNER JOIN MasterType ON Master.NoMasterT=MasterType.Numero;
 WHERE Master.Numero=41;
 ORDER BY Master.LastName,Master.FirstName

This line executes well. But, sometimes, the OleDb provider reports:

"Command contains unrecognized phrase/keyword."

I really don't understand that one I would have to say.