[R] Problem with nlme version 3.1-68

Prof Brian Ripley ripley at stats.ox.ac.uk
Thu Jan 5 10:09:55 CET 2006

It's a bug.  So nothing in the test suites uses this (nor any example in 
any package on CRAN, which were tested prior to release).

Note that 3.1-68 is not the version of nlme which ships with R 2.2.1 
(deliberately not introducing a new feature until after release).
Look for 3.1-68.1 in due course.

On Thu, 5 Jan 2006, Bing T. Guan wrote:

> Dear All:
> I updated my R program as well as associated packages yesterday. Currently
> my R version is 2.2.1 running under WINXP SP-2.
> When I tried to list (summary) an nlme object that I developed before, I got
> the following error message:
> [ Error in .C("ARMA_constCoef", as.integer(attr(object, "p")),
> as.integer(attr(object,  :
>        C entry point "ARMA_constCoef" not in DLL for package "nlme" ]
> The nlme object was fitted with corr = corARMA(q=2) option. I refitted the
> model, and the same error message appeared. I then refitted the model with
> option corr = corARMA(p=1), then no problem; but for p = 2, or q = 1 or 2,
> then the error occurred. When I listed the same fitted nlme objects under R
> 2.1.1 with nlme 3.1-65, then no problem.
> I fitted the Ovary data (Pinheiro and Bates 2000, p.397) using the script
> provided in nlme package
> fm3Ovar.nlme <- update(fm1Ovar.nlme, correlation = corARMA(p=0, q=2)), and
> tried to list the result. The same error occurred. I tried it out on several
> of PCs (WINXP SP-2, R 2.2.1, nlme 3.1-68) and the same situation happened on
> every machine.
> Is there a bug in the latest version of nlme (3.1-68), or the problem only
> happened to me and my machines?
> ***************************************
> Biing T. Guan
> School of Forestry and Resource Conservation
> National Taiwan University
> btguan at ntu.edu.tw
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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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