pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4529-tunebook.ps) >>/Users/jc/w/tmp/Tune-4529-get.log 2>&1" returned status 256
http://richardrobinson.tunebook.org.uk/static/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_4529.log 254919 Log file, useful mostly for debugging
Form_4529.log 826 Log file, useful mostly for debugging
Form_45296.log 826 Log file, useful mostly for debugging
Tune-4529-get.log 0 Log file, useful mostly for debugging
Tune-4529-tunebook.abc 0 ABC music file with the extracted tune(s)
Tune-4529-tunebook.ps 0 PostScript
Tune-4529-tunebook.txt 0 Plain-text file with the extracted tune(s)
Tune-45291-get.log 5025 Log file, useful mostly for debugging
Tune-45292-get.log 2240 Log file, useful mostly for debugging
Tune-45293-get.log 4002 Log file, useful mostly for debugging
Tune-45294-get.log 0 Log file, useful mostly for debugging
Tune-45296-get.log 5215 Log file, useful mostly for debugging
Tune-45298-get.log 1026 Log file, useful mostly for debugging
These files should be available for 24 hours.