pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-86637-Prince_Charlie_2-Dm-16-4.ps) >>/Users/jc/w/tmp/Tune-86637-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/reel/Prince_Charlie_2-Dm-16-4.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-86637-Prince_Charlie_2-Dm-16-4.abc 791 ABC music file with the extracted tune(s)
Tune-86637-Prince_Charlie_2-Dm-16-4.ps 35956 PostScript
Tune-86637-Prince_Charlie_2-Dm-16-4.txt 791 Plain-text file with the extracted tune(s)
Tune-86637-get.log 5001 Log file, useful mostly for debugging
These files should be available for 24 hours.