pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6723-tunebook.ps) >>/Users/jc/w/tmp/Tune-6723-get.log 2>&1" returned status 256
http://richardrobinson.tunebook.org.uk/data/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_67231.log 66074 Log file, useful mostly for debugging
Coll_67239.log 64994 Log file, useful mostly for debugging
Form_67237.log 748 Log file, useful mostly for debugging
Form_67239.log 740 Log file, useful mostly for debugging
Tune-6723-get.log 4759 Log file, useful mostly for debugging
Tune-6723-tunebook.abc 628 ABC music file with the extracted tune(s)
Tune-6723-tunebook.ps 35397 PostScript
Tune-6723-tunebook.txt 628 Plain-text file with the extracted tune(s)
Tune-67231-get.log 283228 Log file, useful mostly for debugging
Tune-67236-get.log 1407 Log file, useful mostly for debugging
These files should be available for 24 hours.