It seems that installed.packages has changed behavior in 3.2.0. We have a local package repository containing only binaries of packages (for Windows). Since 3.2.0, using install.packages for a package form such a repository does not work any more. The solution is to add the parameter type=?binary?. The documentation mentions that options(install.packages.check.source = "no?) suppresses check for source version of the packages, but using this and install.packages without type=?binary? produces an error because seemingly there still is a check for the source version of the package. [[alternative HTML version deleted]]