pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-42487-20732_Swiss_Boy.ps) >>/Users/jc/w/tmp/Tune-42487-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/20732_Swiss_Boy.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_42487.log 2052 Log file, useful mostly for debugging
Tune-42487-20732_Swiss_Boy.abc 625 ABC music file with the extracted tune(s)
Tune-42487-20732_Swiss_Boy.ps 35929 PostScript
Tune-42487-20732_Swiss_Boy.txt 625 Plain-text file with the extracted tune(s)
Tune-42487-get.log 4473 Log file, useful mostly for debugging
These files should be available for 24 hours.