pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6730-Halfway_House-A-32-2.ps) >>/Users/jc/w/tmp/Tune-6730-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/hornpipe/Halfway_House-A-32-2.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-6730-Halfway_House-A-32-2.abc 457 ABC music file with the extracted tune(s)
Tune-6730-Halfway_House-A-32-2.ps 35839 PostScript
Tune-6730-Halfway_House-A-32-2.txt 457 Plain-text file with the extracted tune(s)
Tune-6730-get.log 5456 Log file, useful mostly for debugging
Tune-67302-get.log 4984 Log file, useful mostly for debugging
Tune-67306-get.log 3406 Log file, useful mostly for debugging
These files should be available for 24 hours.