pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-60777-Amazing_Grace_1-D-16-2.ps) >>/Users/jc/w/tmp/Tune-60777-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/SudburyAncients/hymn/Amazing_Grace_1-D-16-2.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-60777-Amazing_Grace_1-D-16-2.abc 328 ABC music file with the extracted tune(s)
Tune-60777-Amazing_Grace_1-D-16-2.ps 32886 PostScript
Tune-60777-Amazing_Grace_1-D-16-2.txt 328 Plain-text file with the extracted tune(s)
Tune-60777-get.log 4596 Log file, useful mostly for debugging
These files should be available for 24 hours.