The nodes of our cluster do not have pdflatex installed. When running R CMD check there on a package with no errors in documentation, then R-2.13.0-alpha and R-2.12.2 report a possible error in Rd files, while R-2.11.1 did not. The platform is 64 bit CentOS. The output of R CMD check tree_1.0-28.tar.gz under the above three versions of R contains the following. R-2.11.1 stderr sh: pdflatex: command not found sh: latex: command not found stdout * checking for working pdflatex ... NO R-2.12.2 stderr sh: pdflatex: command not found Error in texi2dvi("Rd2.tex", pdf = (out_ext == "pdf"), quiet = FALSE, : unable to run 'pdflatex' on 'Rd2.tex' Error in running tools::texi2dvi stdout * checking PDF version of manual ... WARNING LaTeX errors when creating PDF version. This typically indicates Rd problems. * checking PDF version of manual without hyperrefs or index ... ERROR Re-running with no redirection of stdout/stderr. Hmm ... looks like a package You may want to clean up by 'rm -rf /tmp/RtmpgnWKRW/Rd2pdf3723367e' 2.13.0-alpha stderr Error in texi2dvi("Rd2.tex", pdf = (out_ext == "pdf"), quiet = FALSE, : pdflatex is not available Error in running tools::texi2dvi stdout * checking PDF version of manual ... WARNING LaTeX errors when creating PDF version. This typically indicates Rd problems. * checking PDF version of manual without hyperrefs or index ... ERROR Re-running with no redirection of stdout/stderr. Hmm ... looks like a package You may want to clean up by 'rm -rf /tmp/RtmpQ0WawT/Rd2pdf41481e1' Is it intentional not to test the presence of pdflatex during R CMD check? Petr Savicky.