pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-8911-tunebook.abc -F fmt/pdf_60.fmt +s 0.60 +maxs 2000 )>/Users/jc/w/tmp/Tune-8911-tunebook.ps 2>>/Users/jc/w/tmp/Tune-8911-get.log" returned status 256.
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8911-tunebook.ps) >>/Users/jc/w/tmp/Tune-8911-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_89110.log 130707 Log file, useful mostly for debugging
Coll_89111.log 273249 Log file, useful mostly for debugging
Coll_89118.log 151277 Log file, useful mostly for debugging
Find_89112.log 1457 Log file, useful mostly for debugging
Tune-8911-get.log 0 Log file, useful mostly for debugging
Tune-8911-tunebook.abc 0 ABC music file with the extracted tune(s)
Tune-89113-get.log 0 Log file, useful mostly for debugging
Tune-89119-get.log 0 Log file, useful mostly for debugging
These files should be available for 24 hours.