When using Affy version 1.1 and trying to use Widgets I might have encountered a bug? I tried to load tcl and tk packages again but it did not solve the problem. This is what I tried and what happened: Data <- ReadAffy(widget=TRUE) R - replies: 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' What can I do? Anybody have a clue? Best regards // Anna :0) -- ******************************************************* Anna Gustafsson Royal Institute of Technology Stockholm Center for Physics, Astronomy and Biotechnology Department of Molecular Biotechnology 106 91 Stockholm, Sweden Phone (office): + 46 (8) 553 783 41 Fax: + 46 (8) 553 784 81 Visiting adress: Roslagstullsbacken 21, Floor 3 Delivery adress: Roslagsvägen 30B *******************************************************