pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-96983-BarrackHill.ps) >>/Users/jc/w/tmp/Tune-96983-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/BarrackHill.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-96983-BarrackHill.abc 349 ABC music file with the extracted tune(s)
Tune-96983-BarrackHill.ps 33116 PostScript
Tune-96983-BarrackHill.txt 349 Plain-text file with the extracted tune(s)
Tune-96983-MissSayersAllemand.abc 325 ABC music file with the extracted tune(s)
Tune-96983-MissSayersAllemand.ps 33217 PostScript
Tune-96983-MissSayersAllemand.txt 325 Plain-text file with the extracted tune(s)
Tune-96983-get.log 9132 Log file, useful mostly for debugging
These files should be available for 24 hours.