pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-88305-15_Allemande.ps) >>/Users/jc/w/tmp/Tune-88305-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1770/Longman_Cotillons/15_Allemande.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-88305-15_Allemande.abc 1675 ABC music file with the extracted tune(s)
Tune-88305-15_Allemande.ps 39665 PostScript
Tune-88305-15_Allemande.txt 1675 Plain-text file with the extracted tune(s)
Tune-88305-get.log 4696 Log file, useful mostly for debugging
These files should be available for 24 hours.