pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7432-BarbarasMaggot.ps) >>/Users/jc/w/tmp/Tune-7432-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/England/BarbarasMaggot.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_74322.log 278710 Log file, useful mostly for debugging
Coll_74325.log 278710 Log file, useful mostly for debugging
Tune-7432-BarbarasMaggot.abc 976 ABC music file with the extracted tune(s)
Tune-7432-BarbarasMaggot.ps 36522 PostScript
Tune-7432-BarbarasMaggot.txt 976 Plain-text file with the extracted tune(s)
Tune-7432-get.log 4406 Log file, useful mostly for debugging
These files should be available for 24 hours.