pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4944-webtunes.ps) >>/Users/jc/w/tmp/Tune-4944-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/BenBolker/webtunes.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_49446.log 257739 Log file, useful mostly for debugging
Form_4944.log 870 Log file, useful mostly for debugging
Tune-4944-get.log 4339 Log file, useful mostly for debugging
Tune-4944-webtunes.abc 449 ABC music file with the extracted tune(s)
Tune-4944-webtunes.ps 36265 PostScript
Tune-4944-webtunes.txt 449 Plain-text file with the extracted tune(s)
Tune-49445-get.log 4228 Log file, useful mostly for debugging
These files should be available for 24 hours.