[BioC] Trouble with affy version 1.2.1

[Isaac Neuhaus]

I am running R 1.5.1 and I have installed the affy package version
1.2.1. When I start R and select library affy I get the following error.
Any help?

Isaac

P.S. I have installed HDF5 and rhdf5.
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> library(affy)
Loading required package: Biobase
Loading required package: methods
Expanding the signature to include omitted arguments
in definition: j = "missing"

Attaching package `Biobase':


        The following object(s) are masked from package:base :

         split

*************
affy: development version (...this is usable...)
*************
demo(affy.tour) will eventually work and give an overview...
*************
If you have tkWidgets and rhdf5 installed, try
expresso(widget=T, hdf5=T)
 for a real thrill...
Loading required package: eda
-->detecting normalization methods from naming convention
-->detecting expression value methods from naming convention
-->detecting background correction methods from naming convention
-->initCdf
-->initCel
-->initCel.container
Loading required package: rhdf5

Attaching package `rhdf5':


        The following object(s) are masked from package:base :

         is.finite is.matrix

-->initPPSet
-->initPPSet.container
-->initPlob
Error in setMethod("abstract", "Plob", function(object)
abstract(object@description),  :
        No existing definition for function "abstract"
Error in library(affy) : .First.lib failed