[BioC] Error loading, on Bioconductor 1.8, exprSet generated with bioconductor 1.7

[rcaloger]

Hi,
today I was working on an Affy exprSet I saved before the new release of 
Bioconductor (1.8).
I loaded it but I got the following error when I tried to show it:
library(affy)
load("tr7.rma.rda")
tr7.rma
Error in slot(object, what) : no slot of name "pubMedIds" for this 
object of class "MIAME"

Furthermore, if I issue the command:
str(tr7.rma)
I got this error:
Error in FUN(X[[6]], ...) : no slot of name "reporterInfo" for this 
object of class "exprSet"

I was expecting that there should be some sort of back compatibility 
with  at least the previous release of the exprSet.
The error comes using the  Biobase Version: 1.10.0.
 
There is any way to fix the problem or Do I have to install again the 
old release of  Bioconductor?
Thanks
Raf


-- 

----------------------------------------
Prof. Raffaele A. Calogero
Bioinformatics and Genomics Unit
Dipartimento di Scienze Cliniche e Biologiche
c/o Az. Ospedaliera S. Luigi
Regione Gonzole 10, Orbassano
10043 Torino
tel.   ++39 0116705420
Lab.   ++39 0116705408
Fax    ++39 0119038639
Mobile ++39 3333827080
email: raffaele.calogero at unito.it
www:   www.bioinformatica.unito.it