[R-pkg-devel] Cannot reproduce CRAN error (Solaris i386)

[Daeyoung Lim]

Hello,

I have a package on CRAN called 'metapack' and received a message from
Professor Ripley that the error must be resolved for the package to be
safely retained in CRAN. I've encountered this error on R-CMD-check on
GitHub but cannot replicate it on any of my local machines to save my life.
The reproducible code snippet is as follows (I use Rcpp/RcppArmadillo):

library(metapack)
data("cholesterol")
Outcome <- model.matrix(~ pldlc + phdlc + ptg, data = cholesterol)
SD <- model.matrix(~ sdldl + sdhdl + sdtg, data = cholesterol)
Trial <- cholesterol$Trial
Treat <- cholesterol$trt
Npt <- cholesterol$Npt
XCovariate <- model.matrix(~ 0 + bldlc + bhdlc + btg + age + durat +
white + male + dm, data = cholesterol)
WCovariate <- model.matrix(~ trt, data = cholesterol)

fmodel <- 1
set.seed(2797542)
fit <- bayes.parobs(Outcome, SD, XCovariate, WCovariate, Treat, Trial,
  Npt, fmodel, mcmc = list(ndiscard = 1, nskip = 1, nkeep = 1),
  scale_x = TRUE, group = cholesterol$onstat, verbose = FALSE)

which gives me the following error:

warning: chol(): given matrix is not symmetric  error: chol():
decomposition failed

This can't be true because (1) it runs without problem on other machines,
(2) every matrix that is Cholesky-decomposed is ensured to be symmetric
through Sig = 0.5 * (Sig + Sig.t());. Even with Sig = arma::symmatu(Sig)
doesn't seem to guarantee symmetry.

Has anyone encountered something similar to this?
Thank you for your time.

*Daeyoung Lim, MS*

Ph.D. Student

Department of Statistics

University of Connecticut

Philip E. Austin, <https://goo.gl/maps/HsS7bzAMgCw>215 Glenbrook Road
<https://goo.gl/maps/HsS7bzAMgCw>

Storrs Mansfield, CT 06269-4120 <https://goo.gl/maps/HsS7bzAMgCw>

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