Dear List I am developing a package which needs another package purely for one of the datasets it uses. What is Best Practice for doing this? Simply including it in the Dependencies: list in the DESCRIPTION file is giving me curious errors from R CMD check or R CMD INSTALL: Error in code2LazyLoadDB(package, lib.loc = lib.loc, keep.source keep.source, : name space must not be loaded. ERROR: lazy loading failed for package ?MM? This error seems to be system-dependent. All of the depencies are packages which are on CRAN and AFAICS pass R CMD check. Can anyone advise? -- Robin Hankin Uncertainty Analyst hankin.robin at gmail.com