pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-76326-083.ps) >>/Users/jc/w/tmp/Tune-76326-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EverydaySongBook/083=Sweet_and_Low-V2.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_76326.log 264661 Log file, useful mostly for debugging
Tune-76326-083.abc 1530 ABC music file with the extracted tune(s)
Tune-76326-083.ps 38058 PostScript
Tune-76326-083.txt 1530 Plain-text file with the extracted tune(s)
Tune-76326-get.log 4670 Log file, useful mostly for debugging
These files should be available for 24 hours.