pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5970-CJ12.ps) >>/Users/jc/w/tmp/Tune-5970-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/CJ12.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_59703.log 334910 Log file, useful mostly for debugging
Coll_59705.log 130550 Log file, useful mostly for debugging
Coll_59709.log 465578 Log file, useful mostly for debugging
Tune-5970-CJ12.abc 2623 ABC music file with the extracted tune(s)
Tune-5970-CJ12.ps 47559 PostScript
Tune-5970-CJ12.txt 2623 Plain-text file with the extracted tune(s)
Tune-5970-get.log 4347 Log file, useful mostly for debugging
These files should be available for 24 hours.