pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-24687-203.ps) >>/Users/jc/w/tmp/Tune-24687-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/WilliamChristie/203=Mill_O_Tifties_Annie.abc2.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-24687-203.abc 1141 ABC music file with the extracted tune(s)
Tune-24687-203.ps 39974 PostScript
Tune-24687-203.txt 1141 Plain-text file with the extracted tune(s)
Tune-24687-get.log 4746 Log file, useful mostly for debugging
These files should be available for 24 hours.