pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-47119-CountryFarmer.ps) >>/Users/jc/w/tmp/Tune-47119-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/CountryFarmer.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-47119-CountryFarmer.abc 313 ABC music file with the extracted tune(s)
Tune-47119-CountryFarmer.ps 34102 PostScript
Tune-47119-CountryFarmer.txt 313 Plain-text file with the extracted tune(s)
Tune-47119-get.log 4462 Log file, useful mostly for debugging
These files should be available for 24 hours.