Hi all, I just downloadad and installed the package "GEOquery" from bioconductor web site. The installation carried-out with no errors. However, when I try to load the library: "library(GEOquery)", I get the following error: ---------------------------------------------------------------------- --- > library(GEOquery); Error in makeClassRepresentation(Class, properties, superClasses, prototype, : element 2 is empty; the part of the args list of 'list' being evaluated was: (header = list(), ) Error : unable to load R code in package 'GEOquery' Error: package/namespace load failed for 'GEOquery' ---------------------------------------------------------------------- -- This is the sessionInfo() output: ---------------------------------------------------------------------- -- > sessionInfo(); R version 2.6.0 (2007-10-03) i686-pc-linux-gnu locale: LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US .UTF-8;LC_MONETARY=en_US.UTF-8;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US. UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8 ;LC_IDENTIFICATION=C attached base packages: [1] tools stats graphics grDevices utils datasets methods [8] base other attached packages: [1] Biobase_1.16.1 limma_2.12.0 loaded via a namespace (and not attached): [1] rcompgen_0.1-15 ---------------------------------------------------------------------- Looking at this output, It seems that the package is not installed. However, when i do "installed.packages()" GEOquery appears in the list! I can not figure-out where the error is... Any help? Thanks in advance! Best, Juan Carlos