pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7821-CR67.ps) >>/Users/jc/w/tmp/Tune-7821-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/CR67.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_78218.log 260444 Log file, useful mostly for debugging
Tune-7821-CR67.abc 1879 ABC music file with the extracted tune(s)
Tune-7821-CR67.ps 45972 PostScript
Tune-7821-CR67.txt 1879 Plain-text file with the extracted tune(s)
Tune-7821-get.log 4332 Log file, useful mostly for debugging
Tune-78210-get.log 1334 Log file, useful mostly for debugging
Tune-78214-get.log 1310 Log file, useful mostly for debugging
Tune-78218-get.log 1450 Log file, useful mostly for debugging
These files should be available for 24 hours.