pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-30046-8bars.ps) >>/Users/jc/w/tmp/Tune-30046-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/500/8bars.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-30046-8bars.abc 132 ABC music file with the extracted tune(s)
Tune-30046-8bars.ps 30997 PostScript
Tune-30046-8bars.txt 132 Plain-text file with the extracted tune(s)
Tune-30046-get.log 8360 Log file, useful mostly for debugging
These files should be available for 24 hours.