pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-91712-531_Storrow_House.ps) >>/Users/jc/w/tmp/Tune-91712-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/BotCDaSS/531_Storrow_House.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-91712-531_Storrow_House.abc 1156 ABC music file with the extracted tune(s)
Tune-91712-531_Storrow_House.ps 38062 PostScript
Tune-91712-531_Storrow_House.txt 1156 Plain-text file with the extracted tune(s)
Tune-91712-get.log 4594 Log file, useful mostly for debugging
These files should be available for 24 hours.