pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-47925-SpeedThePlough.ps) >>/Users/jc/w/tmp/Tune-47925-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/SpeedThePlough.abc

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-47925-SpeedThePlough.abc 714 ABC music file with the extracted tune(s)
Tune-47925-SpeedThePlough.ps 36006 PostScript
Tune-47925-SpeedThePlough.txt 714 Plain-text file with the extracted tune(s)
Tune-47925-get.log 7219 Log file, useful mostly for debugging
These files should be available for 24 hours.