Craig, do you have automatic music spacing turned on? If that’s the case, maybe it’s spacing as you work, so there’s nothing for “Apply Music Spacing to do. Just a theory, of course…

Thanks, Mike.  I'll check on that setting. 

Today, I wanted to add a note to a measure, so I used the "insert" option within Speedy Entry.  The measure got very crowded, with symbols tumbling over each other.  Generally, I set "item spacing" wide enough so that there is no crowding.  Today, neither "Music Spacing" nor "reformat" would adjust the spacing on that measure.   I simply deleted all items within the bar and re-input them from scratch.   This seems to occur anytime I try to use those 2 commands these days.  They used to work, 8 or 10 years ago, but not recently.

Check your system locks and do you have any hard page breaks. A Page Break wil dead end any spacing beyond it. If so delete any hard page breaks.

Thank you, Ernest.   This is a good reminder...anytime something fails to function, it generally turns out to be either my "user error" or a conflicting setting upstream which prevents the the command from executing properly.