[R-pkg-devel] vignette with third party software

Thanks, I?aki! Hopefully, the following is read by Uwe and/or the other CRAN maintainers:

The problem: 
My "swmmr" package provides functions to connect to the software "SWMM" (stormwater management model), offered by the US environmental protection agency (US EPA).
Inside the package, tests and vignettes call the external software with arguments, e.g. "swmm5.exe ARG1 ARG2 ARG3". 
Because the software is not installed on CRAN, checks on re-building of vignette outputs and tests will always fail.

Option 1: