pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3989-11211_Air_Larghetto.ps) >>/Users/jc/w/tmp/Tune-3989-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MoF/11211_Air_Larghetto.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_39890.log 135853 Log file, useful mostly for debugging
Tune-3989-11211_Air_Larghetto.abc 536 ABC music file with the extracted tune(s)
Tune-3989-11211_Air_Larghetto.ps 34491 PostScript
Tune-3989-11211_Air_Larghetto.txt 536 Plain-text file with the extracted tune(s)
Tune-3989-get.log 4584 Log file, useful mostly for debugging
These files should be available for 24 hours.