ERROR 999999: Error executing function.
 An invalid SQL statement was used.
 An invalid SQL statement was used. [BY]
 An invalid SQL statement was used. [SELECT * FROM BY]
 Failed to execute (Feature Class to Feature Class).

FieldName = 'BY'

FieldName in ('BY', 'IN', 'IS')"

Executing (Make Feature Layer): MakeFeatureLayer C:ArcGISDefault.gdblayer feature_class ""Type" = 'BY'" # #