Problems with the ts library

Well, I upgraded to a later release and have been having good luck (R  vers.
0.65.0)  I haven't upgraded my Red-Hat linux from 5.2 so I had to compile from
source ,  ... so far so good.  My problem is with the time series functions
[library(ts)].  I'm trying to use the autocorrelation function-acf() and am
having problems with it.  mainly an error   ERROR -Couldn't find function
"is.univariate.ts"   any thoughts?  is it the version of R I'm using?
...thanks      victor


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