pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5774-tunebook.ps) >>/Users/jc/w/tmp/Tune-5774-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/tunebook.org.uk/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_57741.log 62564 Log file, useful mostly for debugging
Coll_57748.log 67694 Log file, useful mostly for debugging
Tune-5774-get.log 4391 Log file, useful mostly for debugging
Tune-5774-tunebook.abc 685 ABC music file with the extracted tune(s)
Tune-5774-tunebook.ps 37575 PostScript
Tune-5774-tunebook.txt 685 Plain-text file with the extracted tune(s)
Tune-57746-get.log 5204 Log file, useful mostly for debugging
Tune-57747-get.log 4033 Log file, useful mostly for debugging
These files should be available for 24 hours.