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biomart error returning data

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Hello I ran the below commands and got an error. The output asked me to post to the list so here it is. a similar problem was reported for a different related database query: http://article.gmane.org/gmane.science.biology.informatics.conductor/2 5233/match=biomart+invalid+result I will go about it in an different way I think thanks Alasdair -- output of sessionInfo(): > M1_0.exprs = read.table("M1_0.txt", sep="\t", header=TRUE) > library(biomaRt) > ensembl.mart = useMart(biomart="ensembl",dataset="mmusculus_gene_ensembl") > ensembl.gene.pos = getBM(attributes = c("ensembl_gene_id","chromosom e_name","start_position","end_position"), filters = "ensembl_gene_id", values = rownames(M1_0.exprs), mart = ensembl.mart) V1 1 2 <html><head><meta http-="" equiv="Content-Type" content="text/html;" charset="iso-8859-1"> 3 ERROR: The requested URL could not be retrieved 4 <style type="text/css"></style> 5 </head><body> 6

ERROR

Error in getBM(attributes = c("ensembl_gene_id", "chromosome_name", "start_position", : The query to the BioMart webservice returned an invalid result: the number of columns in the result table does not equal the number of attributes in the query. Please report this to the mailing list. > sessionInfo() R version 2.15.0 (2012-03-30) Platform: i386-apple-darwin9.8.0/i386 (32-bit) locale: [1] en_GB.UTF-8/en_GB.UTF-8/en_GB.UTF-8/C/en_GB.UTF-8/en_GB.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods [7] base other attached packages: [1] biomaRt_2.12.0 loaded via a namespace (and not attached): [1] RCurl_1.91-1 tools_2.15.0 XML_3.9-4 > traceback() 2: stop("The query to the BioMart webservice returned an invalid result: the number of columns in the result table does not equal the number of attributes in the query. Please report this to the mailing list.") 1: getBM(attributes = c("ensembl_gene_id", "chromosome_name", "start_position", "end_position"), filters = "ensembl_gene_id", values = rownames(data), mart = ensembl.mart) -- Sent via the guest posting facility at bioconductor.org.

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