pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5028-tunebook.ps) >>/Users/jc/w/tmp/Tune-5028-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_50282.log 135547 Log file, useful mostly for debugging
Tune-5028-get.log 4811 Log file, useful mostly for debugging
Tune-5028-tunebook.abc 987 ABC music file with the extracted tune(s)
Tune-5028-tunebook.ps 38578 PostScript
Tune-5028-tunebook.txt 987 Plain-text file with the extracted tune(s)
Tune-50280-get.log 1391 Log file, useful mostly for debugging
Tune-50281-get.log 22987 Log file, useful mostly for debugging
Tune-50283-get.log 7769 Log file, useful mostly for debugging
Tune-50287-get.log 3726551 Log file, useful mostly for debugging
Tune-50288-get.log 3787 Log file, useful mostly for debugging
These files should be available for 24 hours.