Hi, Found in \value section of man page for tools::write_PACKAGES: Invisibly returns the number of packages described in the resulting \file{PACKAGES} and \file{PACKAGES.gz} files. If \code{0}, no packages were found and no files were written. Those days (don't know when this has changed exactly), PACKAGES and PACKAGES.gz are written, even if no packages were found (which is a good thing BTW). Thanks, H. -- Herv? Pag?s Program in Computational Biology Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M1-B514 P.O. Box 19024 Seattle, WA 98109-1024 E-mail: hpages at fhcrc.org Phone: (206) 667-5791 Fax: (206) 667-1319