[BioC] 'tcltk' not available error

[Dan Handley]

Hello,

When I try to read Affymetrix data using widget exactly per "How to load
Affymetrix data," I get the following error. I can load the data just
fine using "ReadAffy()". I am using Windows XP, R version 1.6.1, and
downloaded and installed Biobase and Affy packages. Any suggestions?
Thank you! Dan Handley

> data <- ReadAffy(widget=TRUE)
Loading required package: tkWidgets 
Loading required package: tcltk 
Error in firstlib(which.lib.loc, package) : 
        TCL_LIBRARY is not set
Error in eval(expr, envir, enclos) : tcl/tk package `tcltk' not
available -- forget about `tkWidgets'!
>