Dear Bioconductor group: I am running R 2.3.1 on a duo core Intel MacBook under OS X. While all the R and Bioconductor libraries appear to run ok, I got the following error message when loading widgetTools. > library(widgetTools) Loading required package: tcltk Loading Tcl/Tk interface ... Error in dyn.load(x, as.logical(local), as.logical(now)) : unable to load shared library '/Library/Frameworks/R.framework/Versions/2.3/Resources/library/tcltk/ libs/i 386/tcltk.so': dlopen(/Library/Frameworks/R.framework/Versions/2.3/Resources/library/ tcltk/ libs/i386/tcltk.so, 10): Library not loaded: /usr/X11R6/lib/libX11.6.dylib Referenced from: /Library/Frameworks/R.framework/Versions/2.3/Resources/library/tcltk/l ibs/i3 86/tcltk.so Reason: image not found Error: .onLoad failed in 'loadNamespace' for 'tcltk' Error in fun(...) : Package tcltk not able to be loaded! Error: .onLoad failed in 'loadNamespace' for 'widgetTools' Error: package/namespace load failed for 'widgetTools' Can anyone help me with this error. Cheers, John E. Cornell, Ph.D. Professor Department of Medicine Department of Epidemiology and Biostatistics University of Texas Health Science Center, San Antonio 7703 Floyd Curl Drive San Antonio, Texas 78229-3900 ---------------- "Expectation, hope, intention towards possibility ... this is not only a basic feature of human consciousness, but ... a basic determination within reality as a whole." -- Ernst Bloch -- The Principle of Hope, vol. 1