[R] demo(tkttest) exits with error messages

[Griffith Feeney]

I've just installed tcl version 8.3 for windows for use with rw1021,
running on win95 (4.00.950). demo(tkttest) gives the following error messages.

> require(tcltk) || stop("tcltk support is absent")
Loading required package: tcltk 
Error in firstlib(which.lib.loc, package) : 
        TCL_LIBRARY is not set
Error in eval.with.vis(expr, envir, enclos) : 
        tcltk support is absent

Can't find any explanation in the documentation (looked at refman chapter
11) or mailing list archives.  TCL_LIBRARY is a DOS environment variable,
presumably? What should it be set to? Tried setting it to
"C:\PROGRA~1\TCL\LIB" (where tcl is installed), this doesn't work.


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