pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-54416-IaST-abc2.ps) >>/Users/jc/w/tmp/Tune-54416-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnMacphersonMulhollan/IaST-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
Coll_54416.log 150544 Log file, useful mostly for debugging
Tune-54416-IaST-abc2.abc 22813 ABC music file with the extracted tune(s)
Tune-54416-IaST-abc2.ps 243894 PostScript
Tune-54416-IaST-abc2.txt 22813 Plain-text file with the extracted tune(s)
Tune-54416-get.log 20236 Log file, useful mostly for debugging
These files should be available for 24 hours.