pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-42124-10571_Merry_Girl.ps) >>/Users/jc/w/tmp/Tune-42124-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP1/10571_Merry_Girl.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-42124-10571_Merry_Girl.abc 936 ABC music file with the extracted tune(s)
Tune-42124-10571_Merry_Girl.ps 39224 PostScript
Tune-42124-10571_Merry_Girl.txt 936 Plain-text file with the extracted tune(s)
Tune-42124-get.log 4871 Log file, useful mostly for debugging
These files should be available for 24 hours.