After updated xCode latest version (7.3). There is an error with core plot datasource.
(Previous version its worked.)

datasource not available

this is original
@property (nonatomic, readwrite, cpt_weak_property) __cpt_weak id<CPTPlotDataSource> dataSource;
and i just remove __cpt_weak it worked.
@property (nonatomic, readwrite, cpt_weak_property) id<CPTPlotDataSource> dataSource;
i don't know can i remove __cpt_weak.
@eskroch