[BioC] Error with ReadAffy

[Isaac Neuhaus]

I am running R 1.6.2 with affy 1.2.22 and I am getting the following error:

 > cels<-list()
 > cels[1] <- "GM1A.cel"
 > cels[2] <- "GM2A.cel"
 > cels[3] <- "GM3A.cel"
 > cels[4] <- "GM4A.cel"
 > cels[5] <- "GM5A.cel"
 > cels[6] <- "GM6A.cel"
 > cels[7] <- "GM7A.cel"
 > cels[8] <- "GM8A.cel"
 > cels[9] <- "GM9A.cel"
 > data <- ReadAffy(filenames=cels, verbose =T)
1 reading GM2001041001A.cel ...done.
instanciating an AffyBatch (intensity a 409600x9 matrix)...done.
Error in "intensity<-"(*tmp*, value = c(intensity(cel))) :
        couldn't find function "exprs<-"
 >
 > traceback()
3: "intensity<-"(*tmp*, value = c(intensity(cel)))
2: read.affybatch(filenames = filenames, phenoData = phenoData,
       description = description, notes = notes, compress = compress,
       rm.mask = rm.mask, rm.outliers = rm.outliers, rm.extra = rm.extra,
       verbose = verbose)
1: ReadAffy(filenames = cels, verbose = T)
 >

What should I do?

Thanks in advance,

Isaac