When running the debugger for the very first time after setting it up (as
outlined in my tutorial at
http://robsnotebook.com/php_debugger_pdt_xdebug), I found that I got a
cryptic error message "The selection cannot be launched, and there are no
recent launches". See step 8.a.i of the tutorial.
I found that to get rid of it, for my very first debug session, instead of
using "Debug", I needed to open the debug dialog and click "Debug" in that
dialog to make this error go away.