No way to get a menu trace?

I'm trying to get a menu trace, but the tool window won't open, and I can't figure out how to get it to work...

Notice that the Menu Trace tool is greyed out. 


Dear Daniel,

Please Press cmd/ctrl+alt+B when some of the completion items is selected


EDIT:  Okay, that seems to work.  I thought I tried that before, but now it works *shrug*


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