关于#GEO#的问题，如何解决？(语言-r语言)

问题遇到GEO数据库原始数据分析， data<-ReadAffy()后系统提示：Error in AllButCelsForReadAffy(..., filenames = filenames, widget = widget, : No cel filennames specified and no cel files in specified directory:C:/Users/Administrator/Desktop/cel/Normal的现象，求助各位大佬！