Hi all, I ran a list of genes through biomaRt with the following code and it gives me this error in the snp retrieval aspect of it. I doubt it's a connection/proxy problem because I have that taken care of, I think and every step prior to that seemed to have worked just fine. Any ideas what the problem might be? Thanks. -Avoks mart = useMart(biomart="ensembl", dataset="hsapiens_gene_ensembl") genes = read.delim("DAVID_BFE_Genes_4_06_2012.txt", header = TRUE) results = getBM(attributes = c("ensembl_gene_id", "hgnc_symbol", "chromosome_name","strand", "transcript_start", "transcript_end" ), filters = "hgnc_symbol", values = genes$Symbol, mart = mart) mart2 = useMart(biomart="snp", dataset="hsapiens_snp") results2 = getBM(attributes = c("refsnp_id", "allele", "snp", "chrom_strand", "cds_start","cds_end","validated", "consequence_type_tv","phenotype_name"), filters = "ensembl_gene", values = results$ensembl_gene_id, mart = mart2) sessionInfo() R version 2.15.0 (2012-03-30) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=English_1252 LC_CTYPE=English_.1252 [3] LC_MONETARY=English_.1252 LC_NUMERIC=C [5] LC_TIME=English_.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] BiocInstaller_1.4.6 biomaRt_2.12.0 loaded via a namespace (and not attached): [1] RCurl_1.91-1.1 tools_2.15.0 XML_3.9-4.1 >