pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-17723-i_cant_get_started.ps) >>/Users/jc/w/tmp/Tune-17723-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/jazz/i_cant_get_started.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-17723-get.log 4646 Log file, useful mostly for debugging
Tune-17723-i_cant_get_started.abc 2473 ABC music file with the extracted tune(s)
Tune-17723-i_cant_get_started.ps 49648 PostScript
Tune-17723-i_cant_get_started.txt 2473 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.