> tran2mir.df <- >microRNA.org2df.fun(url="http://cbio.mskcc.org/microrna_data/human_pr edictions_S_C_aug2010.txt.gz") > Error in `[.data.frame`(d, , col.old) : undefined columns selected Can you please advise on how to solve this problem? Joseph > sessionInfo() R version 2.12.1 RC (2010-12-10 r53825) Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) locale: [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] tools stats graphics grDevices utils datasets methods base other attached packages: [1] CORNA_1.2 XML_3.2-0 RCurl_1.4-3 bitops_1.0-4.1 GEOquery_2.16.3 biomaRt_2.6.0 Biobase_2.10.0 > [[alternative HTML version deleted]]