pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-74161-ChocolateRoundO.ps) >>/Users/jc/w/tmp/Tune-74161-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/england/ChocolateRoundO.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_74161.log 277305 Log file, useful mostly for debugging
Tune-74161-ChocolateRoundO.abc 1057 ABC music file with the extracted tune(s)
Tune-74161-ChocolateRoundO.ps 39277 PostScript
Tune-74161-ChocolateRoundO.txt 1057 Plain-text file with the extracted tune(s)
Tune-74161-get.log 4983 Log file, useful mostly for debugging
These files should be available for 24 hours.