pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-46931-RobertPurdie_TomThumb.ps) >>/Users/jc/w/tmp/Tune-46931-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/RobertPurdie/TomThumb/RobertPurdie_TomThumb.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-46931-RobertPurdie_TomThumb.abc 5666 ABC music file with the extracted tune(s)
Tune-46931-RobertPurdie_TomThumb.ps 67335 PostScript
Tune-46931-RobertPurdie_TomThumb.txt 5666 Plain-text file with the extracted tune(s)
Tune-46931-get.log 8023 Log file, useful mostly for debugging
These files should be available for 24 hours.