Thank you Vincent, updateObject worked. Best Michael On Feb 20, 2011, at 12:14 PM, Vincent Carey wrote: > It isn't a problem with loading it, but with showing it given the relationship between the object and the class definition in your session. After loading, try > > gr = updateObject(gr) > > and then reserialize if it works. If it doesn't, an updateObject method may be needed; you will still be able to interrogate the loaded object for slots manually even if an updater does not exist. > > On Sun, Feb 20, 2011 at 5:19 AM, Michael Dondrup <michael.dondrup at="" uni.no=""> wrote: > Hi, > I have saved a GRanges object and now after updating GenomicRanges I have trouble loading it again: > > > gr > GRanges with 2581 ranges and 4 elementMetadata values > Error in validObject(.Object) : > invalid class "GRanges" object: slots in class definition but not in object: "seqinfo" > > > > This data is very important, so is there a way to restore this object? > > Thank you for your help. > Michael > > > sessionInfo() > R version 2.12.1 (2010-12-16) > Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) > > locale: > [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 > > attached base packages: > [1] stats graphics grDevices utils datasets methods base > > other attached packages: > [1] GenomicRanges_1.2.0 IRanges_1.8.9 > > > > _______________________________________________ > Bioconductor mailing list > Bioconductor at r-project.org > https://stat.ethz.ch/mailman/listinfo/bioconductor > Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor >