I implemented the example from the first article.
I also modified the emulator to provide a little extra information, echoing $_REQUEST['query'] prior to the response.
My test domain is a '.net'.
1. The parent sms msg ('domain hello') is working fine. So channel and designator and path are correct.
2. Using the menu response (send 1 or 2 for 'hello world' or 'hello universe') returns a 'no information is available' response. My debugging shows that the sent query is indeed 'domain hello world' or 'domain hello universe'.
3. Directly sending 'domain hello world' or 'domain hello universe' results in the same unsatisfying response. This increases my confidence that I am following directions but...
it looks like a dotgo problem but I doubt that :)
I do not see much doc on debugging or logs on the dotgo site.