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...rary of tcltk. Unfortunatly I couldn't load the library and it occured the following error message: Error in firstlib(which.lib.loc, package) : TCL_LIBRARY is not set Error in library(pkg, character.only = TRUE) : .First.lib failed I've tried to load it in sveral ways. I reinstalt the this library bud nothing happend. What is the problem and how can I solve it?? An other question how can I define a function so that this function can be used outside of the workspace in which it has been implemented. Is there any possibility to safe a single function?? And how can I do it??...