pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-30526-Dawn_D.ps) >>/Users/jc/w/tmp/Tune-30526-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/Scotland/reel/Dawn_D.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-30526-Dawn_D.abc 463 ABC music file with the extracted tune(s)
Tune-30526-Dawn_D.ps 34068 PostScript
Tune-30526-Dawn_D.txt 463 Plain-text file with the extracted tune(s)
Tune-30526-get.log 4824 Log file, useful mostly for debugging
These files should be available for 24 hours.