Hi:

I am using biomart to get official geneID from ensembleID. the script worked well but today I got an error like this :

    geneName <- getBM(attributes = c("entrezgene_id", "external_gene_name", "ensembl_gene_id"), filters = "ensembl_gene_id", values = ensembleID, mart = ensembl)

> Batch submitting query
> [==============================================================================>--------------------]  80% eta: 19sError in getBM(attributes = c("entrezgene_id",
> "external_gene_name", "ensembl_gene_id"),  :    The query to the
> BioMart webservice returned an invalid result: biomaRt expected a
> character string of length 1.  Please report this on the support site
> at http://support.bioconductor.org

Does anyone know how to fix this?

Thanks, Cai

It may be a transient thing. Try again, and in particular you can use useEnsembl instead of useMart to select a close mirror, which sometimes helps as well.