http_debug not creating log

[CaptainRonOhio]

I have this in my code:
http_debug(*on: '/tmp/test_httpapi_log.txt');

Normally this works just fine. I'm doing a login and logout to an XML API. It never generates the log. It looks like all my other programs other than I'm doing something in between the the login and logout on those.

Any suggestions?

Thanks

[Scott Klement]

I don't understand. Can you provide an example?