pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9689-24_le_Cavalier.ps) >>/Users/jc/w/tmp/Tune-9689-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1770/Longman_Cotillons/24_le_Cavalier.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_9689.log 821040 Log file, useful mostly for debugging
Coll_96891.log 914290 Log file, useful mostly for debugging
Coll_96893.log 445905 Log file, useful mostly for debugging
Coll_96895.log 266065 Log file, useful mostly for debugging
Tune-9689-24_le_Cavalier.abc 2102 ABC music file with the extracted tune(s)
Tune-9689-24_le_Cavalier.ps 38176 PostScript
Tune-9689-24_le_Cavalier.txt 2102 Plain-text file with the extracted tune(s)
Tune-9689-get.log 4737 Log file, useful mostly for debugging
Tune-96892-get.log 1290 Log file, useful mostly for debugging
These files should be available for 24 hours.