Before I ask anything, let me tell you I have no experience whatsoever on Progress Openedge, but my company runs an application made in it and now I have to make some SOAP calls through it. So I figured, why not call an external script made in whatever language I deem fit?
But I can't even find how to run an external script through OpenEdge when I google for it. There's no examples anywhere, the documentation is long and confusing (for me at least). That brings me to this simple question:
How can I call an external script in Progress OpenEdge?
Try OS-COMMAND.
See Progress Knowledge Base, too. And a complete description on how to interact with your OS.