[BioC] normalize.AffyBatch.vsn with reference vsn object

[R Tagett]

Hello,
I am trying to normalize an affybatch (U133plus2) against a reference set (all U133plus2) using 
normalize.AffyBatch.vsn(abatch, reference, ...)
according to the vignette where the reference is a vsn object from a previous fit
and abatch is an affybatch, but the objects do not seem compatible.
I hope that you can help.
A simplified script is shown.
Thank you,
Rebecca T
 
> library(affy)
> library(vsn)
> ab <- read.affybatch(filenames= c("GSM467031.CEL.gz","GSM467033.CEL.gz","GSM467035.CEL.gz")   )
> fit <- vsn2(ab)
vsn2: 1354896 x 3 matrix (1 stratum). Please use 'meanSdPlot' to verify the fit.
> 
> # affybatch with one cel in it
> ab1 <- read.affybatch(filenames=c( "GSM467037.CEL.gz"   ))

> normAb <- normalize.AffyBatch.vsn(ab1, reference=fit)
Error in vsnMatrix(as.matrix(x, ncol = 1), reference, strata, ...) : 
  'nrow(reference)' must be equal to 'nrow(x)'.
> 
> 
> sessionInfo()
R version 2.14.0 (2011-10-31)
Platform: x86_64-redhat-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=C                 LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] hgu133plus2cdf_2.9.1  AnnotationDbi_1.16.19 vsn_3.22.0           
[4] affy_1.32.1           Biobase_2.14.0       

loaded via a namespace (and not attached):
 [1] affyio_1.22.0         BiocInstaller_1.2.1   DBI_0.2-5            
 [4] grid_2.14.0           IRanges_1.12.6        lattice_0.20-6       
 [7] limma_3.10.3          preprocessCore_1.16.0 RSQLite_0.11.1       
[10] tools_2.14.0          zlibbioc_1.0.1       
>