pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7870-CR25.ps) >>/Users/jc/w/tmp/Tune-7870-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/CR25.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_78704.log 827184 Log file, useful mostly for debugging
Tune-7870-CR25.abc 1710 ABC music file with the extracted tune(s)
Tune-7870-CR25.ps 46973 PostScript
Tune-7870-CR25.txt 1710 Plain-text file with the extracted tune(s)
Tune-7870-get.log 4341 Log file, useful mostly for debugging
Tune-78700-get.log 437549 Log file, useful mostly for debugging
These files should be available for 24 hours.