pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-42812-01_BAA_BAA_BLACK_SHEEP.ps) >>/Users/jc/w/tmp/Tune-42812-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/HaandMeDoonDaFiddle/01_BAA_BAA_BLACK_SHEEP.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-42812-01_BAA_BAA_BLACK_SHEEP.abc 768 ABC music file with the extracted tune(s)
Tune-42812-01_BAA_BAA_BLACK_SHEEP.ps 33211 PostScript
Tune-42812-01_BAA_BAA_BLACK_SHEEP.txt 768 Plain-text file with the extracted tune(s)
Tune-42812-get.log 4837 Log file, useful mostly for debugging
These files should be available for 24 hours.