pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6908-tunebook.ps) >>/Users/jc/w/tmp/Tune-6908-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_69087.log 136152 Log file, useful mostly for debugging
Tune-6908-get.log 7576 Log file, useful mostly for debugging
Tune-6908-tunebook.abc 519 ABC music file with the extracted tune(s)
Tune-6908-tunebook.ps 34882 PostScript
Tune-6908-tunebook.txt 519 Plain-text file with the extracted tune(s)
Tune-69083-get.log 1628 Log file, useful mostly for debugging
Tune-69084-get.log 3141 Log file, useful mostly for debugging
Tune-69085-get.log 3605 Log file, useful mostly for debugging
Tune-69086-get.log 9215 Log file, useful mostly for debugging
These files should be available for 24 hours.