This package requires that java be installed but otherwise has no special installation requirements. In particular, the package includes a copy of H2 so H2 need not be separately installed. If do you wish to use a version of H2 other than the one included in the package then do something like this (or place the option statement in your .Rprofile file). library(RH2) options(RH2.jars = "C:/tmp2/h2-1.3.154.jar")