pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-56431-Remick.ps) >>/Users/jc/w/tmp/Tune-56431-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Remick.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_56431.log 478220 Log file, useful mostly for debugging
Tune-56431-Remick.abc 2320 ABC music file with the extracted tune(s)
Tune-56431-Remick.ps 48861 PostScript
Tune-56431-Remick.txt 2320 Plain-text file with the extracted tune(s)
Tune-56431-get.log 5775 Log file, useful mostly for debugging
These files should be available for 24 hours.