[BioC] BiomaRt: getLDS keeps returning NULL

[Nolwenn Le Meur [guest]]

Dear list,

I am trying to use the getLDS function from the biomaRt package to get mouse homolog for human genes but whatever example I take the function getLDS keeps returning NULL.

> human = useMart("ensembl", dataset = "hsapiens_gene_ensembl")
> mouse = useMart("ensembl", dataset = "mmusculus_gene_ensembl")
> getLDS(attributes = c("hgnc_symbol","chromosome_name", "start_position"), filters = "hgnc_symbol", values = "TP53",mart = human,attributesL = c("chromosome_name","start_position"), martL = mouse)
NULL
Message d'avis :
In getLDS(attributes = c("hgnc_symbol", "chromosome_name", "start_position"),  :
  getLDS returns NULL.

Thank you for your help
Nolwenn


 -- output of sessionInfo(): 

R version 2.15.0 (2012-03-30)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

locale:
[1] C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] biomaRt_2.12.0       mouse4302.db_2.7.1   BiocInstaller_1.4.9 
[4] org.Mm.eg.db_2.7.1   RSQLite_0.11.2       DBI_0.2-5           
[7] AnnotationDbi_1.18.4 Biobase_2.16.0       BiocGenerics_0.2.0  

loaded via a namespace (and not attached):
[1] IRanges_1.14.4 RCurl_1.95-3   XML_3.95-0.1   stats4_2.15.0  tcltk_2.15.0  
[6] tools_2.15.0  

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