pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9223-tunebook.ps) >>/Users/jc/w/tmp/Tune-9223-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_92230.log 137967 Log file, useful mostly for debugging
Coll_92233.log 136152 Log file, useful mostly for debugging
Form_92233.log 828 Log file, useful mostly for debugging
Form_92236.log 1748 Log file, useful mostly for debugging
Tune-9223-get.log 14698 Log file, useful mostly for debugging
Tune-9223-tunebook.abc 739 ABC music file with the extracted tune(s)
Tune-9223-tunebook.ps 34635 PostScript
Tune-9223-tunebook.txt 739 Plain-text file with the extracted tune(s)
Tune-92233-get.log 3581 Log file, useful mostly for debugging
Tune-92235-get.log 2893 Log file, useful mostly for debugging
These files should be available for 24 hours.