Dear All,
    I have a list of human genes with EntrezGene IDs. And I want to
retrieve dN and dS values of them from biomaRt.
I used the following command.
library(biomaRt)
ensembl = useMart("ensembl", dataset = "hsapiens_gene_ensembl")
inputfile<-"gene_list.txt";
geneIDs<-read.table(inputfile,header=F);
dnds <- getBM(attributes = c("entrezgene", "mmusculus_homolog_dn",
"mmusculus_homolog_ds"), filters = c("entrezgene"), values= geneIDs, mart =
ensembl)
There is an error as the following:
Query ERROR: caught BioMart::Exception::Usage: Attributes from multiple
attribute pages are not allowed

Could anyone give some suggestions on this? Thanks very much!

Best all!

-- 
David Wang

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