pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-20662-CaberFeidh.ps) >>/Users/jc/w/tmp/Tune-20662-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/Scotland/reel/CaberFeidh.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-20662-CaberFeidh.abc 607 ABC music file with the extracted tune(s)
Tune-20662-CaberFeidh.ps 35555 PostScript
Tune-20662-CaberFeidh.txt 607 Plain-text file with the extracted tune(s)
Tune-20662-get.log 9753 Log file, useful mostly for debugging
These files should be available for 24 hours.