Knute, Simon and Anders.
Thank you for all your response.
It looks that I install v2.19.57 to a USB drive give me problem. After the install, directory entry is there and I assume everything is there. When I add lilypond preference to frecobaldi v3.0.0 and it fails.
Knute, after your email I check the directory content of directory on USD drive, but find none. So I re-install lilypond v2.19.57 to drive C, and the "add" lilypond preference works.
Thank you,
Ming.
From: Knute Snortum <address@hidden>
To: address@hidden
Sent: Thursday, March 23, 2017 11:10 AM
Subject: Re: [Frescobaldi] cannot add lilypond 2.19.57 to lilypond preference