Popc is not supported under Win32. Files can be opened in either text or binary mode. In binary mode, all characters are read and written without interpretation. In addition, if the file is a console input or screen buffer, any org other than false interacts with the console in 'raw' mode. Failure to do so is a guaranteed way of hanging your Poplog process for good.
Similar considerations apply also to writing to a process through a pipe.
The Poplog program group contains sample program items for running Poplog. To run other languages, copy one or other program item and change the command line to include the appropriate language image.