pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-47435-151.ps) >>/Users/jc/w/tmp/Tune-47435-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Fraser/151=Mary_Mc_Leods_Cronan.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
Tune-47435-151.abc 1404 ABC music file with the extracted tune(s)
Tune-47435-151.ps 39405 PostScript
Tune-47435-151.txt 1404 Plain-text file with the extracted tune(s)
Tune-47435-get.log 8316 Log file, useful mostly for debugging
These files should be available for 24 hours.