When I try to build vignettes for a package under Windows the package shared library is built twice, first presumably to generate the vignette, and then to generate the package binary. But the library building steps are of course the same. Is this a known issue or is there a way to get it to build the library only once? If I have already processed the vignettes and use the --no-vignettes option then there is no problem, it builds the library once and uses the PDF files that are there. Thanks for any pointers. Dominick [[alternative HTML version deleted]]