pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1941-CR73.ps) >>/Users/jc/w/tmp/Tune-1941-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/CR73.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_19414.log 423425 Log file, useful mostly for debugging
Tune-1941-CR73.abc 1750 ABC music file with the extracted tune(s)
Tune-1941-CR73.ps 47678 PostScript
Tune-1941-CR73.txt 1750 Plain-text file with the extracted tune(s)
Tune-1941-get.log 4357 Log file, useful mostly for debugging
Tune-19414-get.log 10466 Log file, useful mostly for debugging
Tune-19418-get.log 5666 Log file, useful mostly for debugging
These files should be available for 24 hours.