pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8726-CJ52.ps) >>/Users/jc/w/tmp/Tune-8726-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/CJ52.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_87263.log 430454 Log file, useful mostly for debugging
Tune-8726-CJ52.abc 2165 ABC music file with the extracted tune(s)
Tune-8726-CJ52.ps 48871 PostScript
Tune-8726-CJ52.txt 2165 Plain-text file with the extracted tune(s)
Tune-8726-get.log 9732 Log file, useful mostly for debugging
These files should be available for 24 hours.