pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-18862-4323.ps) >>/Users/jc/w/tmp/Tune-18862-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow/CR/4323=Orange_and_Blue-abc2.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Sess-18862.log 8389 Log file, useful mostly for debugging
Tune-18862-4323.abc 1344 ABC music file with the extracted tune(s)
Tune-18862-4323.ps 41948 PostScript
Tune-18862-4323.txt 1344 Plain-text file with the extracted tune(s)
Tune-18862-get.log 4649 Log file, useful mostly for debugging
These files should be available for 24 hours.