Hi Simon, Thanks for replying.
On further investigation, I can't reproduce this error on my local machine -- it only occurs when sending to a cluster (to run the multiple imputations in parallel) that I've got access to. I send to a friend's web server, and I get the same sort of error (but a different set of results!) that the cluster gave me. The seed is set identically across the three machines. gam.check indicates convergence after 16 iterations locally, but 21 iterations on both remote machines. And both remote machines give results that penalize the random effects, and the first, second and fourth spline terms effectively to zero (res.df ~1e-7).
I then checked versions. My local machine has mgcv 1.7.22, the cluster has 1.7.3, and the server has 1.7.12. My local machine has R 2.15.1, the cluster has 2.12.2, and the server has 2.14.1. I updated the server's R version, and the result was fixed. Will see if the people who manage the cluster can update the cluster.
The tryCatch is there because my imputation models that feed the gams are not bug-free.
Thanks anyway for replying. Best, Andrew ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
