pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-8142-tunebook.abc -F fmt/pdf_60.fmt +s 0.60 +maxs 2000 )>/Users/jc/w/tmp/Tune-8142-tunebook.ps 2>>/Users/jc/w/tmp/Tune-8142-get.log" returned status 35584.
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8142-tunebook.ps) >>/Users/jc/w/tmp/Tune-8142-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_8142.log 274659 Log file, useful mostly for debugging
Coll_81420.log 139782 Log file, useful mostly for debugging
Coll_81422.log 265406 Log file, useful mostly for debugging
List81426.log 0 Log file, useful mostly for debugging
Tune-8142-get.log 0 Log file, useful mostly for debugging
Tune-8142-tunebook.abc 0 ABC music file with the extracted tune(s)
Tune-8142-tunebook.ps 0 PostScript
Tune-8142-tunebook.txt 0 Plain-text file with the extracted tune(s)
Tune-81421-get.log 4039 Log file, useful mostly for debugging
Tune-81423-get.log 5357 Log file, useful mostly for debugging
These files should be available for 24 hours.