pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-87504-Abergenny_PLFD1657_114.ps) >>/Users/jc/w/tmp/Tune-87504-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/Abergenny_PLFD1657_114.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-87504-Abergenny_PLFD1657_114.abc 303 ABC music file with the extracted tune(s)
Tune-87504-Abergenny_PLFD1657_114.ps 32670 PostScript
Tune-87504-Abergenny_PLFD1657_114.txt 303 Plain-text file with the extracted tune(s)
Tune-87504-get.log 8614 Log file, useful mostly for debugging
These files should be available for 24 hours.