pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-71529-20_l_Amitie.ps) >>/Users/jc/w/tmp/Tune-71529-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/1770/Longman_Cotillons/20_l_Amitie.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-71529-20_l_Amitie.abc 1563 ABC music file with the extracted tune(s)
Tune-71529-20_l_Amitie.ps 39645 PostScript
Tune-71529-20_l_Amitie.txt 1563 Plain-text file with the extracted tune(s)
Tune-71529-get.log 9828 Log file, useful mostly for debugging
These files should be available for 24 hours.