pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-81999-IaST-abc1.ps) >>/Users/jc/w/tmp/Tune-81999-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnMacphersonMulhollan/IaST-abc1.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-81999-1812_JGray.abc 17653 ABC music file with the extracted tune(s)
Tune-81999-1812_JGray.ps 131717 PostScript
Tune-81999-1812_JGray.txt 17653 Plain-text file with the extracted tune(s)
Tune-81999-IaST-abc1.abc 22704 ABC music file with the extracted tune(s)
Tune-81999-IaST-abc1.ps 243993 PostScript
Tune-81999-IaST-abc1.txt 22704 Plain-text file with the extracted tune(s)
Tune-81999-get.log 43076 Log file, useful mostly for debugging
These files should be available for 24 hours.