pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-31060-tunebook.ps) >>/Users/jc/w/tmp/Tune-31060-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
Tune-31060-get.log 8025 Log file, useful mostly for debugging
Tune-31060-tunebook.abc 1809 ABC music file with the extracted tune(s)
Tune-31060-tunebook.ps 58365 PostScript
Tune-31060-tunebook.txt 1809 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.