pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-86005-CaptainsMaggot_PLFD1698_373.ps) >>/Users/jc/w/tmp/Tune-86005-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/CaptainsMaggot_PLFD1698_373.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-86005-CaptainsMaggot_PLFD1698_373.abc 402 ABC music file with the extracted tune(s)
Tune-86005-CaptainsMaggot_PLFD1698_373.ps 34368 PostScript
Tune-86005-CaptainsMaggot_PLFD1698_373.txt 402 Plain-text file with the extracted tune(s)
Tune-86005-get.log 4861 Log file, useful mostly for debugging
These files should be available for 24 hours.