hello I was just doing my project everything was OK but i encounter an horrendous error

Error: 'exprs<-' is not an exported object from 'namespace:affy'

what shoud I do? my code is

data=loadMAdata(setup ="targets.txt",annotation = "Annotation.txt",normalization = "plier"
           ,datadir = "C:/Users/98912/Desktop/CML")
#normalization="plier","mas5'"RMA" 

I don't know what is wrong with it ,

The problem is in the piano package, which seems to want to do lots of fully qualified function calling, without trying to figure out where the functions come from. In loadMAdata there is this bit:

  if(nCelFiles > 0 & missing(dataNorm)) {
    # Load CEL-files
    .verb("Loading CEL files...", verbose)
    dataRaw <- affy::ReadAffy(celfile.path=datadir, ...)
    colnames(affy::exprs(dataRaw)) <- gsub("\\.CEL","",colnames(affy::exprs(dataRaw)), ignore.case=TRUE)
    colnames(affy::exprs(dataRaw)) <- gsub("\\.gz","",colnames(affy::exprs(dataRaw)), ignore.case=TRUE)
    if(sum(duplicated(colnames(affy::exprs(dataRaw)))) > 0) stop("found samples with identical names")
    .verb("...done", verbose)

Where things like affy::exprs(dataRaw) are trying to use a function from the affy package that isn't a function in the affy package:

> affy::exprs(Dilution) <- exprs(Dilution)
 Error: 'exprs<-' is not an exported object from 'namespace:affy'
> Biobase::exprs(Dilution) <- exprs(Dilution)

But instead is a function defined in the Biobase package. Ideally the maintainer of this package is subscribed to this support site and will see this thread and fix the function. Failing that you can contact him directly using the email address found by

packageDescription("piano")$Main