pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-29619-tunes.ps) >>/Users/jc/w/tmp/Tune-29619-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1802/Thompson/tunes.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-29619-get.log 8716 Log file, useful mostly for debugging
Tune-29619-tunes.abc 707 ABC music file with the extracted tune(s)
Tune-29619-tunes.ps 33020 PostScript
Tune-29619-tunes.txt 707 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.