Dear all, when I use this function: 

simbols.eg <- select(Homo.sapiens,keys=elementMetadatagenes.gr)$gene_id,columns="SYMBOL",keytype="GENEID")

I get this error:

Error in UseMethod("select_") : 
  no applicable method for 'select_' applied to an object of class "c('OrganismDb', 'MultiDb')"

I have the Homo.sapiens 1.3.1 while if I use the version 1.1.2 I have not this problem. Could you help me?

Thank you.

Riccardo

Looks like you loaded dplyr after the Homo.sapiens package. The "select" method you're calling is from dplyr

You could try something like AnnotationDbi::select(Homo.sapiens, ...)