pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-88940-tunebook.ps) >>/Users/jc/w/tmp/Tune-88940-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/tunebook.org.uk/tunebook.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
Coll_88940.log 256329 Log file, useful mostly for debugging
Tune-88940-get.log 4300 Log file, useful mostly for debugging
Tune-88940-tunebook.abc 809 ABC music file with the extracted tune(s)
Tune-88940-tunebook.ps 46643 PostScript
Tune-88940-tunebook.txt 809 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.