r - openCPU and rstan - cannot open the connection -


i'm using opencpu create api estimate pretty basic models in rstan.

i have verified function works in environment when called normal r console session, opposed called opencpu.

but when called via opencpu, response following:

cannot open connection  in call: file(con, "r")

by inserting checkpoints in source of rstan, i've traced 1 call in r/cxxfunplus.r (link line on github here):

dso <- new('cxxdso', sig = sig, dso_saved = save_dso,               dso_filename = dso_filename,               modulename = module_name,               system = r.version$system,               cxxflags = get_makefile_flags("cxxflags"),               .cxxdsomisc = new.env(parent = emptyenv()))

what in call trying read connection might fail?

figured out - 1 of 2 makefiles rstan::get_makefile_txt looking doesn't exist when run under opencpu. file /usr/share/r/share/make.

fortunately first makefile exist , sufficient, can corrected skipping second makefile , reading first.

before last line of rstan::get_makefile_text, inserted following:

makefiles <- makefiles[file.exists(makefiles)]

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