A user has reported an issue that appears when a fortran executable is called via R on Windows. I am unsure if this expected behavior or a bug in Fortran or in how R calls Windows executables.
The problem is that when the fortran program is called from R, stdout gets written to a file "fort.6" instead of stdout. When the same executable is called from the terminal it works fine and prints to stdout. This unexpected behavior is unfortunate for R wrappers that rely on captured output. A minimal example is available from github [1] and can be installed with devtools::install_github("jeroen/ftest") ftest::hello() When running ftest::hello() on linux, R will properly capture output. However on Windows it will return an empty string, and a file 'fort.6' gets created in the working directory instead. The executables can be found in: system.file("bin", package = "ftest") Interestingly if we open a command line terminal and run the same executable it prints output to stdout. So perhaps it has to do with the way R invokes CreateProcess() on Windows? [1] https://github.com/jeroen/ftest ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel