Hi! I'm finding this on MacOS Lion 10.7.5
> getOption("digits.secs") NULL > a <- "2012_10_01_14_13_32.445" > strptime(a,format="%Y_%M_%d_%H_%M_%OS") [1] "2012-02-01 14:13:32" > strptime(a,format="%Y_%M_%d_%H_%M_%OS3") [1] NA I can solve it with > options(digits.secs=3) > strptime(a,format="%Y_%M_%d_%H_%M_%OS") [1] "2012-02-01 14:13:32.445" But is this not in contradiction with the help page? " if %OS is not followed by a digit, it uses the setting of getOption("digits.secs"), or if that is unset, n = 3" Thanks Agus PS > sessionInfo() R version 2.15.1 (2012-06-22) Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] sp_0.9-99 loaded via a namespace (and not attached): [1] grid_2.15.1 lattice_0.20-6 tools_2.15.1 -- Dr. Agustin Lobo Institut de Ciencies de la Terra "Jaume Almera" (CSIC) Lluis Sole Sabaris s/n 08028 Barcelona Spain Tel. 34 934095410 Fax. 34 934110012 e-mail agustin.l...@ictja.csic.es https://sites.google.com/site/aloboaleu/ ______________________________________________ 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.