how do I interact with the inferior prolog process in emacs?

Question

I've installed SWI-Prolog and Emacs' prolog mode. I have a first_steps.pl file with prolog in it, and I do Cc Cb to consult the buffer. This opens a second buffer, *prolog* , whose mode is (Inferior Prolog: run) .

All well and good. However, it's completely unclear how to interact with that inferior prolog mode buffer. There is no prompt. Typing things and pressing return does nothing. How can I execute queries based on the code consulted from the buffer, ie, interact with SWI-prolog?

Note that this related question does not seem to address usage of the inferior mode, only installation of prolog mode: Using prolog with emacs

Answer 1

In my case, I changed the variable prolog-program-name to use the full path to my swipl executable, then it was fine. Emacs might just not be able to find your interpreter.