pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-51226-speed_the_plough.ps) >>/Users/jc/w/tmp/Tune-51226-get.log 2>&1" returned status 256
http://www.piper-frank.de/tunebook/trad/abc/speed_the_plough.txt

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-51226-get.log 4525 Log file, useful mostly for debugging
Tune-51226-speed_the_plough.abc 3074 ABC music file with the extracted tune(s)
Tune-51226-speed_the_plough.ps 41199 PostScript
Tune-51226-speed_the_plough.txt 3074 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.