Hi all, 

I have issues using some basic functions in R such as these ones : 

> pp.test(R) (where is a vector of returns)
Error in .C("R_approx", as.double(x), as.double(y), as.integer(nx), xout =
as.double(xout),  : 
  C symbol name "R_approx" not in DLL for package "base"

>boxcox(reg,plotit=T)  (where reg is an lm object)
Error in .C("spline_coef", method = as.integer(method), n = as.integer(nx), 
: 
  C symbol name "spline_coef" not in DLL for package "base"

as I do miss some symbol names. 

How can I overcome this serious problem ? 


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