pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-18021-FishersH_D3.ps) >>/Users/jc/w/tmp/Tune-18021-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/Scotland/reel/FishersH_D3.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-18021-FishersH_D3.abc 545 ABC music file with the extracted tune(s)
Tune-18021-FishersH_D3.ps 35740 PostScript
Tune-18021-FishersH_D3.txt 545 Plain-text file with the extracted tune(s)
Tune-18021-get.log 4510 Log file, useful mostly for debugging
These files should be available for 24 hours.