pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-19890-243_SallyRobinsonsFavorite.ps) >>/Users/jc/w/tmp/Tune-19890-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Pringle/243_SallyRobinsonsFavorite.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_19890.log 465410 Log file, useful mostly for debugging
Tune-19890-243_SallyRobinsonsFavorite.abc 1060 ABC music file with the extracted tune(s)
Tune-19890-243_SallyRobinsonsFavorite.ps 43190 PostScript
Tune-19890-243_SallyRobinsonsFavorite.txt 1060 Plain-text file with the extracted tune(s)
Tune-19890-get.log 4845 Log file, useful mostly for debugging
These files should be available for 24 hours.