Hi, When I type library("tcltk") under R 2.8.1 I get the error message: Loading Tcl/Tk interface ...Error in inDL(x, as.logical(local), as.logical(now), ...) : unable to load shared library 'C:/PROGRA~1/R/R-28~1.1/library/tcltk/libs/tcltk.dll': LoadLibrary failure: The specified module could not be found. Error : .onLoad failed in 'loadNamespace' for 'tcltk' Error: package/namespace load failed for 'tcltk' I have the same problem with 2.7.0 but not in R 2.6.2. This problem appeared from the R 2.8.1 installation. Can you help me? Many Thanks, --------------------------------------------------- Rita Sousa Departamento de Metodologia e Sistemas de Informação INE - DP: Instituto Nacional de Estatística - Delegação do Porto Tel.: 22 6072016 (Extensão: 4116) --------------------------------------------------- [[alternative HTML version deleted]]